diff --git i/field_group.module w/field_group.module
index 772405d..357a917 100644
--- i/field_group.module
+++ w/field_group.module
@@ -2025,6 +2025,15 @@ function field_group_fields_nest(&$element, &$vars = NULL) {
       // Construct own weight, as some fields (for example preprocess fields) don't have weight set.
       $element[$group_name] = array();
       $group_references[$group_name] = &$element[$group_name];
+      // Get group parents
+      $parents = array();
+      $current_group = $group;
+      while (!empty($current_group)) {
+        array_unshift($parents, $current_group->group_name);
+        $current_group = $element['#fieldgroups'][$current_group->parent_name];
+      }
+      $group_references[$group_name]['#array_parents'] = $parents;
+      $element['#fieldgroups'][$group_name]->array_parents = $parents;
     }
   }
 
@@ -2075,6 +2084,19 @@ function field_group_fields_nest(&$element, &$vars = NULL) {
         // list intact (but if it is a field we don't mind).
         $group_references[$parent_name][$child_name] = &$element[$child_name];
         $group_references[$parent_name]['#weight'] = $element['#fieldgroups'][$parent_name]->weight;
+        // Set #array_parents of group child element
+        $group_child = &$group_references[$parent_name][$child_name];
+        $group_parents = $group_references[$parent_name]['#array_parents'];
+        if (isset($group_child['#array_parents'])) {
+          // array_unique in case it's already prepended ... somehow
+          $group_child['#array_parents'] = array_unique(array_merge($group_parents, $group_child['#array_parents']));
+        }
+        // And recursively for element's children
+        foreach (_element_children_recursive_ref($group_child) as &$group_child_child) {
+          if (isset($group_child_child['#array_parents'])) {
+            $group_child_child['#array_parents'] = array_unique(array_merge($group_parents, $group_child['#array_parents']));
+          }          
+        }
       }
 
       // The child has been copied to its parent: remove it from the root element.
@@ -2239,3 +2261,23 @@ function _field_group_get_default_formatter_settings($format_type, $mode) {
   );
 }
 
+
+/**
+ * Recursive element_children, returns children by reference
+ */
+function _element_children_recursive_ref(&$element)
+{
+  $results = array();
+  $children = element_children($element);
+  foreach($children as $key)
+  {
+    $child = &$element[$key];
+    if(is_array($child))
+    {
+      $results[] = &$child;
+      $results = array_merge($results, _element_children_recursive_ref($child));
+    }
+    unset($child);
+  }
+  return $results;
+}