diff --git a/leaflet-markercluster/leaflet-markercluster-tests.ts b/leaflet-markercluster/leaflet-markercluster-tests.ts
new file mode 100644
index 0000000000..8c1a4721c9
--- /dev/null
+++ b/leaflet-markercluster/leaflet-markercluster-tests.ts
@@ -0,0 +1,19 @@
+/// <reference path="leaflet-markercluster.d.ts" />
+
+var map: L.Map;
+var markerClusterGroup: L.MarkerClusterGroup;
+
+// CircleMarker
+var circleMarker: L.CircleMarker = new L.CircleMarker(new L.LatLng(0, 0));
+
+markerClusterGroup.addLayer(circleMarker);
+map.addLayer(markerClusterGroup);
+map.removeLayer(markerClusterGroup);
+
+// Marker
+var marker = new L.Marker(new L.LatLng(0, 0));
+
+markerClusterGroup.addLayers([circleMarker, marker]);
+map.addLayer(markerClusterGroup);
+markerClusterGroup.refreshClusters();
+map.removeLayer(markerClusterGroup);
diff --git a/leaflet-markercluster/leaflet-markercluster.d.ts b/leaflet-markercluster/leaflet-markercluster.d.ts
new file mode 100644
index 0000000000..cffa7cb409
--- /dev/null
+++ b/leaflet-markercluster/leaflet-markercluster.d.ts
@@ -0,0 +1,125 @@
+// Type definitions for Leaflet.markercluster v0.4.0
+// Project: https://github.com/Leaflet/Leaflet.markercluster
+// Definitions by: Robert Imig <https://github.com/rimig>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../leaflet/leaflet.d.ts" />
+
+declare module L {
+    export interface MarkerClusterGroupOptions {
+
+      /*
+      * When you mouse over a cluster it shows the bounds of its markers.
+      */
+      showCoverageOnHover?: boolean;
+
+      /*
+      * When you click a cluster we zoom to its bounds.
+      */
+      zoomToBoundsOnClick?: boolean;
+
+      /*
+      * When you click a cluster at the bottom zoom level we spiderfy it
+      * so you can see all of its markers.
+      */
+      spiderfyOnMaxZoom?: boolean;
+
+      /*
+      * Clusters and markers too far from the viewport are removed from the map
+      * for performance.
+      */
+      removeOutsideVisibleBounds?: boolean;
+
+      /*
+      * Smoothly split / merge cluster children when zooming and spiderfying.
+      * If L.DomUtil.TRANSITION is false, this option has no effect (no animation is possible).
+      */
+      animate?: boolean;
+
+      /*
+      * If set to true (and animate option is also true) then adding individual markers to the
+      * MarkerClusterGroup after it has been added to the map will add the marker and animate it
+      * into the cluster. Defaults to false as this gives better performance when bulk adding markers.
+      * addLayers does not support this, only addLayer with individual Markers.
+      */
+      animateAddingMarkers?: boolean;
+
+      /*
+      * If set, at this zoom level and below markers will not be clustered. This defaults to disabled.
+      */
+      disableClusteringAtZoom?: number;
+
+      /*
+      * The maximum radius that a cluster will cover from the central marker (in pixels). Default 80.
+      * Decreasing will make more, smaller clusters.
+      */
+      maxClusterRadius?: number;
+
+      /*
+      * Options to pass when creating the L.Polygon(points, options) to show the bounds of a cluster.
+      * Defaults to empty
+      */
+      polygonOptions?: PolylineOptions;
+
+      /*
+      * If set to true, overrides the icon for all added markers to make them appear as a 1 size cluster.
+      */
+      singleMarkerMode?: boolean;
+
+      /*
+      * Allows you to specify PolylineOptions to style spider legs.
+      * By default, they are { weight: 1.5, color: '#222', opacity: 0.5 }.
+      */
+      spiderLegPolylineOptions?: PolylineOptions;
+
+      /*
+      * Increase from 1 to increase the distance away from the center that spiderfied markers are placed.
+      * Use if you are using big marker icons (Default: 1).
+      */
+      spiderfyDistanceMultiplier?: number;
+
+      /*
+      * Function used to create the cluster icon
+      */
+      iconCreateFunction?: any;
+    }
+
+    export class MarkerClusterGroup extends FeatureGroup<ILayer> {
+      initialize(): void;
+      initialize(options: MarkerClusterGroupOptions): void;
+
+      /*
+      * Bulk methods for adding and removing markers and should be favoured over the
+      * single versions when doing bulk addition/removal of markers.
+      */
+      addLayers(layers:ILayer[]):MarkerClusterGroup;
+      removeLayers(layers:ILayer[]):MarkerClusterGroup;
+
+      clearLayers():MarkerClusterGroup;
+
+      /*
+      * If you have a marker in your MarkerClusterGroup and you want to get the visible
+      * parent of it
+      */
+      getVisibleParent(marker: Marker): Marker;
+
+      /*
+      * If you have customized the clusters icon to use some data from the contained markers,
+      * and later that data changes, use this method to force a refresh of the cluster icons.
+      */
+      refreshClusters():MarkerClusterGroup;
+      refreshClusters(layerGroup:LayerGroup<ILayer>):MarkerClusterGroup;
+      refreshClusters(marker: Marker):MarkerClusterGroup;
+      refreshClusters(markers: Marker[]):MarkerClusterGroup;
+
+      /*
+      * Returns the total number of markers contained within that cluster.
+      */
+      getChildCount(): number;
+
+      /*
+      * Returns the array of total markers contained within that cluster.
+      */
+      getAllChildMarkers(): Marker[];
+    }
+}