diff --git a/wp-includes/post.php b/wp-includes/post.php
index 3bfede95da..97a3fb8f77 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -7489,6 +7489,22 @@ function update_post_author_caches( $posts ) {
 	cache_users( $author_ids );
 }
 
+/**
+ * Prime post parent post caches.
+ *
+ * @since 6.1.0
+ *
+ * @param WP_Post[] $posts Array of Post objects.
+ */
+function update_post_parent_caches( $posts ) {
+	$parent_ids = wp_list_pluck( $posts, 'post_parent' );
+	$parent_ids = array_map( 'absint', $parent_ids );
+	$parent_ids = array_unique( array_filter( $parent_ids ) );
+	if ( ! empty( $parent_ids ) ) {
+		_prime_post_caches( $parent_ids, false );
+	}
+}
+
 /**
  * Updates metadata cache for a list of post IDs.
  *
diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
index ae203b41aa..87de7a2421 100644
--- a/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
+++ b/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
@@ -369,6 +369,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 
 		$posts = array();
 
+		update_post_parent_caches( $query_result );
 		update_post_author_caches( $query_result );
 		if ( post_type_supports( $this->post_type, 'thumbnail' ) ) {
 			update_post_thumbnail_cache( $posts_query );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 156d365e26..1ef3f915b6 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-53505';
+$wp_version = '6.1-alpha-53506';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.