diff --git a/packages/netlify-cms-core/index.d.ts b/packages/netlify-cms-core/index.d.ts
index be4a3835..f0fdefa4 100644
--- a/packages/netlify-cms-core/index.d.ts
+++ b/packages/netlify-cms-core/index.d.ts
@@ -528,6 +528,36 @@ declare module 'netlify-cms-core' {
     fileObj: File;
   };
 
+  type DisplayURL = { id: string; path: string } | string;
+  
+  type EntryField = StaticallyTypedRecord<{
+    field?: EntryField;
+    fields?: List<EntryField>;
+    types?: List<EntryField>;
+    widget: string;
+    name: string;
+    default: string | null | boolean | List<unknown>;
+    media_folder?: string;
+    public_folder?: string;
+    comment?: string;
+    meta?: boolean;
+    i18n: 'translate' | 'duplicate' | 'none';
+  }>;
+
+  interface BackendMediaFile {
+    name: string;
+    id: string;
+    size?: number;
+    displayURL?: DisplayURL;
+    path: string;
+    draft?: boolean;
+    url?: string;
+    file?: File;
+    field?: EntryField;
+  }
+
+  type MediaFile = BackendMediaFile & { key?: string };
+
   export type PreviewTemplateComponentProps = {
     entry: Map<string, any>;
     collection: Map<string, any>;
@@ -549,6 +579,8 @@ declare module 'netlify-cms-core' {
     getRemarkPlugins: () => Array<Pluggable>;
     getLocale: (locale: string) => CmsLocalePhrases | undefined;
     getMediaLibrary: (name: string) => CmsMediaLibrary | undefined;
+    selectMediaFiles(field?: EntryField | undefined): MediaFile[];
+    resolveWidget: (name: string) => CmsWidget | undefined;
     getPreviewStyles: () => PreviewStyle[];
     getPreviewTemplate: (name: string) => ComponentType<PreviewTemplateComponentProps> | undefined;
     getWidget: (name: string) => CmsWidget | undefined;
diff --git a/packages/netlify-cms-core/src/lib/registry.js b/packages/netlify-cms-core/src/lib/registry.js
index 534ccf50..23f07be8 100644
--- a/packages/netlify-cms-core/src/lib/registry.js
+++ b/packages/netlify-cms-core/src/lib/registry.js
@@ -3,6 +3,8 @@ import produce from 'immer';
 import { oneLine } from 'common-tags';
 
 import EditorComponent from '../valueObjects/EditorComponent';
+import { selectMediaFiles as selectMediaFilesSelector } from '../reducers/mediaLibrary';
+import { store } from '../redux';
 
 const allowedEvents = [
   'prePublish',
@@ -224,6 +226,19 @@ export function getMediaLibrary(name) {
   return registry.mediaLibraries.find(ml => ml.name === name);
 }
 
+export function selectMediaFiles(field) {
+  const state = store.getState();
+  if (state) {
+    return selectMediaFilesSelector(state, field);
+  }
+
+  return [];
+}
+
+export function getFiles(name) {
+  return registry.mediaLibraries.find(ml => ml.name === name);
+}
+
 function validateEventName(name) {
   if (!allowedEvents.includes(name)) {
     throw new Error(`Invalid event name '${name}'`);