diff --git a/polymer/polymer.core-overlay.d.ts b/polymer/polymer.core-overlay.d.ts
new file mode 100644
index 000000000..7ca5c5b8f
--- /dev/null
+++ b/polymer/polymer.core-overlay.d.ts
@@ -0,0 +1,90 @@
+// Type definitions for polymer's paper-toast
+// Project: https://github.com/Polymer/core-selector
+// Definitions by: Louis Grignon <https://github.com/lgrignon>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module PolymerComponents {
+	export module Core {
+		export interface Overlay extends PolymerElement, HTMLElement {
+			/**
+			 * The target element that will be shown when the overlay is opened. If unspecified, the core-overlay itself is the target.
+			 * default: the overlay element
+			 */
+			target: Object;
+
+			/**
+			 * A core-overlay's size is guaranteed to be constrained to the window size. To achieve this, the sizingElement is sized with a max-height/width. By default this element is the target element, but it can be specifically set to a specific element inside the target if that is more appropriate. This is useful, for example, when a region inside the overlay should scroll if needed.
+			 * default: the target element
+			 */
+			sizingTarget: Object;
+
+			/**
+			 * Set opened to true to show an overlay and to false to hide it. A core-overlay may be made initially opened by setting its opened attribute.
+			 * default: false
+			 */
+			opened: boolean;
+
+			/**
+			 * If true, the overlay has a backdrop darkening the rest of the screen. The backdrop element is attached to the document body and may be styled with the class core-overlay-backdrop. When opened the core-opened class is applied.
+			 * default: false
+			 */
+			backdrop: boolean;
+
+			/**
+			 * If true, the overlay is guaranteed to display above page content.
+			 * default: false
+			 */
+			layered: boolean;
+
+			/**
+			 * By default an overlay will close automatically if the user taps outside it or presses the escape key. Disable this behavior by setting the autoCloseDisabled property to true.
+			 * default: false
+			 */
+			autoCloseDisabled: boolean;
+
+			/**
+			 * By default an overlay will focus its target or an element inside it with the autoFocus attribute. Disable this behavior by setting the autoFocusDisabled property to true.
+			 * default: false
+			 */
+			autoFocusDisabled: boolean;
+	
+			/**
+			 * This property specifies an attribute on elements that should close the overlay on tap. Should not set closeSelector if this is set.
+			 * default: "core-overlay-toggle"
+			 */
+			closeAttribute: string;
+	
+			/**
+			 * This property specifies a selector matching elements that should close the overlay on tap. Should not set closeAttribute if this is set.
+			 * default: ''
+			 */
+			closeSelector: string;
+	
+			/**
+			 * The transition property specifies a string which identifies a core-transition element that will be used to help the overlay open and close. The default core-transition-fade will cause the overlay to fade in and out.
+			 * default: 'core-transition-fade'
+			 */
+			transition: string;
+
+			/**
+			 * Toggle the opened state of the overlay.
+			 */
+			toggle(): void;
+
+			/**
+			 * Open the overlay. This is equivalent to setting the opened property to true.
+			 */
+			open(): void;
+			
+			/**
+			 * Close the overlay. This is equivalent to setting the opened property to false.
+			 */
+			close(): void;
+
+			/**
+			 * Extensions of core-overlay should implement the resizeHandler method to adjust the size and position of the overlay when the browser window resizes.
+			 */
+			resizeHandler(): void;
+		}
+	}
+} 
\ No newline at end of file
diff --git a/polymer/polymer.core-selector.d.ts b/polymer/polymer.core-selector.d.ts
new file mode 100644
index 000000000..3371369fe
--- /dev/null
+++ b/polymer/polymer.core-selector.d.ts
@@ -0,0 +1,18 @@
+// Type definitions for polymer's paper-toast
+// Project: https://github.com/Polymer/core-selector
+// Definitions by: Louis Grignon <https://github.com/lgrignon>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module PolymerComponents {
+	export module Core {
+		export interface Selector extends PolymerElement, HTMLElement {
+		}
+
+		export interface SelectorOnSelectEvent extends Event {
+			detail: {
+				item: HTMLElement;
+				isSelected: boolean;
+			};
+		}
+	}
+} 
\ No newline at end of file
diff --git a/polymer/polymer.paper-dialog.d.ts b/polymer/polymer.paper-dialog.d.ts
new file mode 100644
index 000000000..fd585e7b7
--- /dev/null
+++ b/polymer/polymer.paper-dialog.d.ts
@@ -0,0 +1,27 @@
+// Type definitions for polymer's paper-dialog
+// Project: https://github.com/Polymer/paper-dialog
+// Definitions by: Louis Grignon <https://github.com/lgrignon>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare module PolymerComponents {
+	export module Paper {
+		export interface Dialog extends PolymerComponents.Core.Overlay, HTMLElement {
+			/**
+			 * The title of the dialog.
+			 * default: ''
+			 */
+			heading: string;
+			
+			/**
+			 * See paper-dialog-transition
+			 * default: ''
+			 */
+			transition: string;
+			
+			/**
+			 * default: true
+			 */
+			layered: boolean;
+		}
+	}
+} 
\ No newline at end of file