diff --git a/entity_browser.services.yml b/entity_browser.services.yml
index 88fedfd..3c8aa09 100644
--- a/entity_browser.services.yml
+++ b/entity_browser.services.yml
@@ -22,3 +22,10 @@ services:
     arguments: ['@module_handler']
     tags:
       - { name: route_enhancer }
+  entity_browser.selection_storage:
+    # Symfony will complain if the class is not defined. However, it seems that
+    # it doesn't use it at all. Interface is not the best thing to set here, but
+    # it seems the best option at the end of the day.
+    class: Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface
+    factory: keyvalue.expirable:get
+    arguments: ['entity_browser']
diff --git a/src/DisplayBase.php b/src/DisplayBase.php
index f2c2569..1a87c8c 100644
--- a/src/DisplayBase.php
+++ b/src/DisplayBase.php
@@ -3,8 +3,11 @@
 namespace Drupal\entity_browser;
 
 use Drupal\Component\Uuid\UuidInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface;
 use Drupal\Core\Plugin\PluginBase;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\Core\Site\Settings;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
 
@@ -51,6 +54,13 @@ abstract class DisplayBase extends PluginBase implements DisplayInterface, Conta
   protected $uuid = NULL;
 
   /**
+   * The selection storage.
+   *
+   * @var \Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface
+   */
+  protected $selectionStorage;
+
+  /**
    * Constructs display plugin.
    *
    * @param array $configuration
@@ -64,11 +74,12 @@ abstract class DisplayBase extends PluginBase implements DisplayInterface, Conta
    * @param \Drupal\Component\Uuid\UuidInterface
    *   UUID generator interface.
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, EventDispatcherInterface $event_dispatcher, UuidInterface $uuid_generator) {
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, EventDispatcherInterface $event_dispatcher, UuidInterface $uuid_generator, KeyValueStoreExpirableInterface $selection_storage) {
     parent::__construct($configuration, $plugin_id, $plugin_definition);
     $this->configuration += $this->defaultConfiguration();
     $this->eventDispatcher = $event_dispatcher;
     $this->uuidGenerator = $uuid_generator;
+    $this->selectionStorage = $selection_storage;
   }
 
   /**
@@ -80,7 +91,8 @@ abstract class DisplayBase extends PluginBase implements DisplayInterface, Conta
       $plugin_id,
       $plugin_definition,
       $container->get('event_dispatcher'),
-      $container->get('uuid')
+      $container->get('uuid'),
+      $container->get('entity_browser.selection_storage')
     );
   }
 
@@ -139,4 +151,15 @@ abstract class DisplayBase extends PluginBase implements DisplayInterface, Conta
     $this->uuid = $uuid;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function displayEntityBrowser(FormStateInterface $form_state, array $entities = []) {
+    // If the existing selection was passed in save it to expirable state for
+    // the entity browser to be able to load them from there.
+    if (!empty($entities)) {
+      $this->selectionStorage->setWithExpire($this->getUuid(), $entities, Settings::get('entity_browser_expire', 21600));
+    }
+  }
+
 }
diff --git a/src/DisplayInterface.php b/src/DisplayInterface.php
index a73f443..7513852 100644
--- a/src/DisplayInterface.php
+++ b/src/DisplayInterface.php
@@ -36,11 +36,13 @@ interface DisplayInterface extends PluginInspectionInterface, ConfigurablePlugin
    *
    * @param \Drupal\Core\Form\FormStateInterface $form_state
    *   The form state object.
+   * @param \Drupal\Core\Entity\EntityInterface[] $entities
+   *   (optional) Existing selection that should be passed to the entity browser.
    *
    * @return array
    *   An array suitable for drupal_render().
    */
-  public function displayEntityBrowser(FormStateInterface $form_state);
+  public function displayEntityBrowser(FormStateInterface $form_state, array $entities = []);
 
   /**
    * Indicates completed selection.
diff --git a/src/Form/EntityBrowserForm.php b/src/Form/EntityBrowserForm.php
index 1a81471..ae3a12a 100644
--- a/src/Form/EntityBrowserForm.php
+++ b/src/Form/EntityBrowserForm.php
@@ -5,6 +5,7 @@ namespace Drupal\entity_browser\Form;
 use Drupal\Component\Uuid\UuidInterface;
 use Drupal\Core\Form\FormBase;
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface;
 use Drupal\entity_browser\DisplayAjaxInterface;
 use Drupal\entity_browser\EntityBrowserFormInterface;
 use Drupal\entity_browser\EntityBrowserInterface;
@@ -30,13 +31,21 @@ class EntityBrowserForm extends FormBase implements EntityBrowserFormInterface {
   protected $entity_browser;
 
   /**
+   * The entity browser selection storage.
+   *
+   * @var \Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface
+   */
+  protected $selectionStorage;
+
+  /**
    * Constructs a EntityBrowserForm object.
    *
    * @param \Drupal\Component\Uuid\UuidInterface $uuid_generator
    *   The UUID generator service.
    */
-  public function __construct(UuidInterface $uuid_generator) {
+  public function __construct(UuidInterface $uuid_generator, KeyValueStoreExpirableInterface $selection_storage) {
     $this->uuidGenerator = $uuid_generator;
+    $this->selectionStorage = $selection_storage;
   }
 
   /**
@@ -44,7 +53,8 @@ class EntityBrowserForm extends FormBase implements EntityBrowserFormInterface {
    */
   public static function create(ContainerInterface $container) {
     return new static(
-      $container->get('uuid')
+      $container->get('uuid'),
+      $container->get('entity_browser.selection_storage')
     );
   }
 
@@ -79,6 +89,11 @@ class EntityBrowserForm extends FormBase implements EntityBrowserFormInterface {
     }
     $form_state->set(['entity_browser', 'selected_entities'], []);
     $form_state->set(['entity_browser', 'selection_completed'], FALSE);
+
+    // Initialize select from the query parameter.
+    if ($selection = $this->selectionStorage->get($form_state->get(['entity_browser', 'instance_uuid']))) {
+      $form_state->set(['entity_browser', 'selected_entities'], $selection);
+    }
   }
 
   /**
diff --git a/src/Plugin/EntityBrowser/Display/IFrame.php b/src/Plugin/EntityBrowser/Display/IFrame.php
index 9eed34f..c3edcba 100644
--- a/src/Plugin/EntityBrowser/Display/IFrame.php
+++ b/src/Plugin/EntityBrowser/Display/IFrame.php
@@ -5,6 +5,7 @@ namespace Drupal\entity_browser\Plugin\EntityBrowser\Display;
 use Drupal\Component\Uuid\UuidInterface;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\Core\Url;
 use Drupal\entity_browser\DisplayBase;
@@ -66,6 +67,8 @@ class IFrame extends DisplayBase implements DisplayRouterInterface {
    *   Event dispatcher service.
    * @param \Drupal\Component\Uuid\UuidInterface
    *   UUID generator interface.
+   * @parem \Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface $selection_storage
+   *   The selection storage.
    * @param \Drupal\Core\Routing\RouteMatchInterface $current_route_match
    *   The currently active route match object.
    * @param \Symfony\Component\HttpFoundation\Request $request
@@ -73,8 +76,8 @@ class IFrame extends DisplayBase implements DisplayRouterInterface {
    * @param \Drupal\Core\Path\CurrentPathStack $current_path
    *   The current path.
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, EventDispatcherInterface $event_dispatcher, UuidInterface $uuid, RouteMatchInterface $current_route_match, Request $request, CurrentPathStack $current_path) {
-    parent::__construct($configuration, $plugin_id, $plugin_definition, $event_dispatcher, $uuid);
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, EventDispatcherInterface $event_dispatcher, UuidInterface $uuid, KeyValueStoreExpirableInterface $selection_storage, RouteMatchInterface $current_route_match, Request $request, CurrentPathStack $current_path) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition, $event_dispatcher, $uuid, $selection_storage);
     $this->currentRouteMatch = $current_route_match;
     $this->request = $request;
     $this->currentPath = $current_path;
@@ -90,6 +93,7 @@ class IFrame extends DisplayBase implements DisplayRouterInterface {
       $plugin_definition,
       $container->get('event_dispatcher'),
       $container->get('uuid'),
+      $container->get('entity_browser.selection_storage'),
       $container->get('current_route_match'),
       $container->get('request_stack')->getCurrentRequest(),
       $container->get('path.current')
@@ -111,28 +115,29 @@ class IFrame extends DisplayBase implements DisplayRouterInterface {
   /**
    * {@inheritdoc}
    */
-  public function displayEntityBrowser(FormStateInterface $form_state) {
-    $uuid = $this->getUuid();
+  public function displayEntityBrowser(FormStateInterface $form_state, array $entities = []) {
+    parent::displayEntityBrowser($form_state, $entities);
     /** @var \Drupal\entity_browser\Events\RegisterJSCallbacks $event */
-    $js_event_object = new RegisterJSCallbacks($this->configuration['entity_browser_id'], $uuid);
+    $js_event_object = new RegisterJSCallbacks($this->configuration['entity_browser_id'], $this->getUuid());
     $js_event_object->registerCallback('Drupal.entityBrowser.selectionCompleted');
     $callback_event = $this->eventDispatcher->dispatch(Events::REGISTER_JS_CALLBACKS, $js_event_object);
     $original_path = $this->currentPath->getPath();
+
     $data = [
       'query_parameters' => [
         'query' => [
-          'uuid' => $uuid,
+          'uuid' => $this->getUuid(),
           'original_path' => $original_path,
         ],
       ],
       'attributes' => [
         'href' => '#browser',
         'class' => ['entity-browser-handle', 'entity-browser-iframe'],
-        'data-uuid' => $uuid,
+        'data-uuid' => $this->getUuid(),
         'data-original-path' => $original_path,
       ],
     ];
-    $event_object = new AlterEntityBrowserDisplayData($this->configuration['entity_browser_id'], $uuid, $this->getPluginDefinition(), $form_state, $data);
+    $event_object = new AlterEntityBrowserDisplayData($this->configuration['entity_browser_id'], $this->getUuid(), $this->getPluginDefinition(), $form_state, $data);
     $event = $this->eventDispatcher->dispatch(Events::ALTER_BROWSER_DISPLAY_DATA, $event_object);
     $data = $event->getData();
     return [
@@ -147,7 +152,7 @@ class IFrame extends DisplayBase implements DisplayRouterInterface {
           'drupalSettings' => [
             'entity_browser' => [
               'iframe' => [
-                $uuid => [
+                $this->getUuid() => [
                   'src' => Url::fromRoute('entity_browser.' . $this->configuration['entity_browser_id'], [], $data['query_parameters'])
                     ->toString(),
                   'width' => $this->configuration['width'],
diff --git a/src/Plugin/EntityBrowser/Display/Modal.php b/src/Plugin/EntityBrowser/Display/Modal.php
index 433cf27..aa9c8b2 100644
--- a/src/Plugin/EntityBrowser/Display/Modal.php
+++ b/src/Plugin/EntityBrowser/Display/Modal.php
@@ -7,6 +7,7 @@ use Drupal\Component\Utility\NestedArray;
 use Drupal\Component\Uuid\UuidInterface;
 use Drupal\Core\Ajax\OpenDialogCommand;
 use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\Core\Url;
 use Drupal\entity_browser\DisplayBase;
@@ -71,15 +72,17 @@ class Modal extends DisplayBase implements DisplayRouterInterface {
    *   Event dispatcher service.
    * @param \Drupal\Component\Uuid\UuidInterface
    *   UUID generator interface.
-   * @param \Drupal\Core\Routing\RouteMatchInterface
+   * @parem \Drupal\Core\KeyValueStore\KeyValueStoreExpirableInterface $selection_storage
+   *   The selection storage.
+   * @param \Drupal\Core\Routing\RouteMatchInterface $current_route_match
    *   The currently active route match object.
    * @param \Symfony\Component\HttpFoundation\Request $request
    *   Current request.
    * @param \Drupal\Core\Path\CurrentPathStack $current_path
    *   The current path.
    */
-  public function __construct(array $configuration, $plugin_id, $plugin_definition, EventDispatcherInterface $event_dispatcher, UuidInterface $uuid, RouteMatchInterface $current_route_match, CurrentPathStack $current_path, Request $request) {
-    parent::__construct($configuration, $plugin_id, $plugin_definition, $event_dispatcher, $uuid);
+  public function __construct(array $configuration, $plugin_id, $plugin_definition, EventDispatcherInterface $event_dispatcher, UuidInterface $uuid, KeyValueStoreExpirableInterface $selection_storage, RouteMatchInterface $current_route_match, CurrentPathStack $current_path, Request $request) {
+    parent::__construct($configuration, $plugin_id, $plugin_definition, $event_dispatcher, $uuid, $selection_storage);
     $this->currentRouteMatch = $current_route_match;
     $this->currentPath = $current_path;
     $this->request = $request;
@@ -95,6 +98,7 @@ class Modal extends DisplayBase implements DisplayRouterInterface {
       $plugin_definition,
       $container->get('event_dispatcher'),
       $container->get('uuid'),
+      $container->get('entity_browser.selection_storage'),
       $container->get('current_route_match'),
       $container->get('path.current'),
       $container->get('request_stack')->getCurrentRequest()
@@ -115,24 +119,25 @@ class Modal extends DisplayBase implements DisplayRouterInterface {
   /**
    * {@inheritdoc}
    */
-  public function displayEntityBrowser(FormStateInterface $form_state) {
-    $uuid = $this->getUuid();
-    $js_event_object = new RegisterJSCallbacks($this->configuration['entity_browser_id'], $uuid);
+  public function displayEntityBrowser(FormStateInterface $form_state, array $entities = []) {
+    parent::displayEntityBrowser($form_state, $entities);
+    $js_event_object = new RegisterJSCallbacks($this->configuration['entity_browser_id'], $this->getUuid());
     $js_event_object->registerCallback('Drupal.entityBrowser.selectionCompleted');
     $js_event = $this->eventDispatcher->dispatch(Events::REGISTER_JS_CALLBACKS, $js_event_object);
     $original_path = $this->currentPath->getPath();
+
     $data = [
       'query_parameters' => [
         'query' => [
-          'uuid' => $uuid,
+          'uuid' => $this->getUuid(),
           'original_path' => $original_path,
         ],
       ],
       'attributes' => [
-        'data-uuid' => $uuid,
+        'data-uuid' => $this->getUuid(),
       ],
     ];
-    $event_object = new AlterEntityBrowserDisplayData($this->configuration['entity_browser_id'], $uuid, $this->getPluginDefinition(), $form_state, $data);
+    $event_object = new AlterEntityBrowserDisplayData($this->configuration['entity_browser_id'], $this->getUuid(), $this->getPluginDefinition(), $form_state, $data);
     $event = $this->eventDispatcher->dispatch(Events::ALTER_BROWSER_DISPLAY_DATA, $event_object);
     $data = $event->getData();
     return [
@@ -146,7 +151,7 @@ class Modal extends DisplayBase implements DisplayRouterInterface {
         '#value' => $this->configuration['link_text'],
         '#limit_validation_errors' => [],
         '#submit' => [],
-        '#name' => Html::getId('op_' . $this->configuration['entity_browser_id'] . '_' . $uuid),
+        '#name' => Html::getId('op_' . $this->configuration['entity_browser_id'] . '_' . $this->getUuid()),
         '#ajax' => [
           'callback' => [$this, 'openModal'],
           'event' => 'click',
@@ -157,8 +162,8 @@ class Modal extends DisplayBase implements DisplayRouterInterface {
           'drupalSettings' => [
             'entity_browser' => [
               'modal' => [
-                $uuid => [
-                  'uuid' => $uuid,
+                $this->getUuid() => [
+                  'uuid' => $this->getUuid(),
                   'js_callbacks' => $js_event->getCallbacks(),
                   'original_path' => $original_path,
                 ],
diff --git a/src/Plugin/EntityBrowser/Display/Standalone.php b/src/Plugin/EntityBrowser/Display/Standalone.php
index 9b8fbc6..e7c8eb9 100644
--- a/src/Plugin/EntityBrowser/Display/Standalone.php
+++ b/src/Plugin/EntityBrowser/Display/Standalone.php
@@ -45,7 +45,8 @@ class Standalone extends DisplayBase implements DisplayRouterInterface {
   /**
    * {@inheritdoc}
    */
-  public function displayEntityBrowser(FormStateInterface $form_state) {
+  public function displayEntityBrowser(FormStateInterface $form_state, array $entities = []) {
+    parent::displayEntityBrowser($form_state, $entities);
     // @TODO Implement it.
   }
 
diff --git a/src/Plugin/Field/FieldWidget/EntityReference.php b/src/Plugin/Field/FieldWidget/EntityReference.php
index 6075b8a..1d7f42a 100644
--- a/src/Plugin/Field/FieldWidget/EntityReference.php
+++ b/src/Plugin/Field/FieldWidget/EntityReference.php
@@ -15,6 +15,7 @@ use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
 use Drupal\Core\Url;
 use Drupal\Core\Validation\Plugin\Validation\Constraint\NotNullConstraint;
+use Drupal\entity_browser\EntityCollection;
 use Drupal\entity_browser\FieldWidgetDisplayManager;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcherInterface;
@@ -380,7 +381,8 @@ class EntityReference extends WidgetBase implements ContainerFactoryPluginInterf
       $entity_browser_uuid = sha1(implode('-', array_merge($form['#parents'], [$this->fieldDefinition->getName(), $delta])));
       $entity_browser_display = $entity_browser->getDisplay();
       $entity_browser_display->setUuid($entity_browser_uuid);
-      $element['entity_browser'] = $entity_browser_display->displayEntityBrowser($form_state);
+
+      $element['entity_browser'] = $entity_browser_display->displayEntityBrowser($form_state, []);
       $element['#attached']['library'][] = 'entity_browser/entity_reference';
       $element['#attached']['drupalSettings']['entity_browser'] = [
         $entity_browser->getDisplay()->getUuid() => [
diff --git a/tests/src/Kernel/Extension/EntityBrowserTest.php b/tests/src/Kernel/Extension/EntityBrowserTest.php
index e6e2791..4fef471 100644
--- a/tests/src/Kernel/Extension/EntityBrowserTest.php
+++ b/tests/src/Kernel/Extension/EntityBrowserTest.php
@@ -60,7 +60,7 @@ class EntityBrowserTest extends KernelTestBase {
     $this->widgetUUID = $this->container->get('uuid')->generate();
     $this->routeProvider = $this->container->get('router.route_provider');
 
-    $this->installSchema('system', ['router']);
+    $this->installSchema('system', ['router', 'key_value_expire', 'sequences']);
   }
 
   /**
@@ -323,6 +323,8 @@ class EntityBrowserTest extends KernelTestBase {
     $entity->getWidgets()->get($entity->getFirstWidget())->entity = $entity;
 
     $this->container->get('form_builder')->buildForm($form_object, $form_state);
+    $this->assertEquals(0, count($form_state->get(['entity_browser', 'selected_entities'])), 'Correct number of entities was propagated.');
+
     $this->container->get('form_builder')->submitForm($form_object, $form_state);
 
     // Event should be dispatched from widget and added to list of selected entities.
@@ -330,4 +332,45 @@ class EntityBrowserTest extends KernelTestBase {
     $this->assertEquals($selected_entities, [$entity], 'Expected selected entities detected.');
   }
 
+  /**
+   * Tests propagation of existing selection.
+   */
+  public function testExistingSelection() {
+    $this->installConfig(['entity_browser_test']);
+    $this->installEntitySchema('user');
+
+    /** @var $entity \Drupal\entity_browser\EntityBrowserInterface */
+    $entity = $this->controller->load('test');
+
+    /** @var \Drupal\user\UserInterface $user */
+    $user = $this->container->get('entity_type.manager')
+      ->getStorage('user')
+      ->create([
+        'name' => $this->randomString(),
+        'mail' => 'info@example.com',
+      ]);
+    $user->save();
+
+    /** @var \Symfony\Component\HttpFoundation\Request $request */
+    $uuid = $this->container->get('uuid')->generate();
+    $this->container->get('request_stack')
+      ->getCurrentRequest()
+      ->query
+      ->set('uuid', $uuid);
+    $this->container->get('entity_browser.selection_storage')->setWithExpire($uuid, [$user], 21600);
+
+    /** @var \Drupal\entity_browser\EntityBrowserFormInterface $form_object */
+    $form_object = $entity->getFormObject();
+    $form_object->setEntityBrowser($entity);
+    $form_state = new FormState();
+
+    $form = [];
+    $form_object->buildForm($form, $form_state);
+    $propagated_entities = $form_state->get(['entity_browser', 'selected_entities']);
+    $this->assertEquals(1, count($propagated_entities), 'Correct number of entities was propagated.');
+    $this->assertEquals($user->id(), $propagated_entities[0]->id(), 'Propagated entity ID is correct.');
+    $this->assertEquals($user->getAccountName(), $propagated_entities[0]->getAccountName(), 'Propagated entity name is correct.');
+    $this->assertEquals($user->getEmail(), $propagated_entities[0]->getEmail(), 'Propagated entity name is correct.');
+  }
+
 }