diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index e026bac5b..4c2fbc8e1 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -218,6 +218,7 @@ All definitions files include a header with the author and editors, so at some p
 * [Microsoft Live Connect](http://msdn.microsoft.com/en-us/library/live/hh243643.aspx) (by [John Vilk](https://github.com/jvilk))
 * [Minimatch](https://github.com/isaacs/minimatch) (by [vvakame](https://github.com/vvakame))
 * [minimist](https://github.com/substack/minimist) (by [Bart van der Schoor](https://github.com/Bartvds))
+* [Mixpanel](https://github.com/mixpanel/mixpanel-js) (by [Knut Eirik Leira Hjelle](https://github.com/hjellek))
 * [mixto](https://github.com/atom/mixto) (by [vvakame](https://github.com/vvakame))
 * [Modernizr](http://modernizr.com/) (by [Boris Yankov](https://github.com/borisyankov) and [Theodore Brown](https://github.com/theodorejb/))
 * [Moment.js](https://github.com/timrwood/moment) (by [Michael Lakerveld](https://github.com/Lakerfield))
diff --git a/mixpanel/mixpanel-tests.ts b/mixpanel/mixpanel-tests.ts
new file mode 100644
index 000000000..a9cf296c3
--- /dev/null
+++ b/mixpanel/mixpanel-tests.ts
@@ -0,0 +1,70 @@
+/// <reference path="mixpanel.d.ts" />
+function mixpanel_base()
+{
+    mixpanel.init("new token", { your: "config" }, "library_name");
+
+    mixpanel.push(['register', { a: 'b' }]);
+
+    mixpanel.disable(['my_event']);
+
+    mixpanel.track("Registered", {"Gender": "Male", "Age": 21});
+
+    mixpanel.track_links("#nav", "Clicked Nav Link");
+
+    mixpanel.track_forms("#register", "Created Account");
+
+    mixpanel.register({device: 'android', version: '4.0.1'});
+
+    mixpanel.register_once({device: 'android', version: '4.0.1'});
+
+    mixpanel.unregister('device');
+
+    mixpanel.identify('234234sdfdsf');
+
+    mixpanel.get_distinct_id();
+
+    mixpanel.alias('w3erwfsdf', '234234sdfdsf');
+
+    mixpanel.set_config({test: true});
+
+    mixpanel.get_config();
+
+    mixpanel.get_property('device');
+}
+
+function mixpanel_people()
+{
+    mixpanel.people.set('gender', 'm');
+    mixpanel.people.set({
+        'Company': 'Acme',
+        'Plan': 'Premium',
+        'Upgrade date': new Date()
+    });
+
+    mixpanel.people.set_once('First Login Date', new Date());
+    mixpanel.people.set_once({
+        'First Login Date': new Date(),
+        'Starting Plan': 'Premium'
+    });
+
+    mixpanel.people.increment('page_views', 1);
+    mixpanel.people.increment('page_views');
+    mixpanel.people.increment('credits_left', -1);
+    mixpanel.people.increment({
+        counter1: 1,
+        counter2: 1
+    });
+
+    mixpanel.people.append('pages_visited', 'homepage');
+    mixpanel.people.append({
+        list1: 'bob',
+        list2: 123
+    });
+
+    mixpanel.people.track_charge(50);
+    mixpanel.people.track_charge(30.50, {'$time': new Date('jan 1 2012')});
+
+    mixpanel.people.clear_charges();
+
+    mixpanel.people.delete_user();
+}
diff --git a/mixpanel/mixpanel.d.ts b/mixpanel/mixpanel.d.ts
new file mode 100644
index 000000000..9d1ef9527
--- /dev/null
+++ b/mixpanel/mixpanel.d.ts
@@ -0,0 +1,71 @@
+// Type definitions for Mixpanel
+// Project: https://mixpanel.com/ (https://github.com/mixpanel/mixpanel-js)
+// Definitions by: Knut Eirik Leira Hjelle <https://github.com/hjellek/>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+interface Mixpanel
+{
+    people:Mixpanel.People;
+
+    init(token:string, config:{[index:string]:any}, libraryName:string):Mixpanel;
+
+    push(item:any[]):void;
+
+    disable(events?:string[]):void;
+
+    track(eventName:string, params?:{[index:string]:any}, callback?:() => void):void;
+
+    track_links(querySelector:string, eventName:string, params?:{[index:string]:any}):void;
+
+    track_forms(querySelector:string, eventName:string, params?:{[index:string]:any}):void;
+
+    register(params:{[index:string]:any}, days?:number):void;
+
+    register_once(params:{[index:string]:any}, defaultValue?:string, days?:number):void;
+
+    unregister(propertyName:string):void;
+
+    identify(id:string):void;
+
+    get_distinct_id():string;
+
+    alias(alias:string, currentId?:string):void;
+
+    set_config(config:{[index:string]:any}):void;
+
+    get_config():{[index:string]:any};
+
+    get_property(propertyName:string):any;
+}
+
+declare module Mixpanel
+{
+    interface People
+    {
+        set(keys:{[index:string]:any}, callback?:() => void):void;
+
+        set(key:string, value:any, callback?:() => void):void;
+
+        set_once(keys:{[index:string]:any}, callback?:() => void):void;
+
+        set_once(key:string, value:any, callback?:() => void):void;
+
+        increment(key:string):void;
+
+        increment(keys:{[index:string]:number}):void;
+
+        increment(key:string, value:number):void;
+
+        append(keys:{[index:string]:any}):void;
+
+        append(key:string, value:any):void;
+
+        track_charge(amount:number, params?:{[index:string]:any}, callback?:() => void):void;
+
+        clear_charges():void;
+
+        delete_user():void;
+    }
+}
+
+declare var mixpanel:Mixpanel;
\ No newline at end of file