diff --git a/src/extras/MovieClip.js b/src/extras/MovieClip.js
index 9fc0ed2..4c5369f 100644
--- a/src/extras/MovieClip.js
+++ b/src/extras/MovieClip.js
@@ -19,16 +19,25 @@
  * @class
  * @extends PIXI.Sprite
  * @memberof PIXI.extras
- * @param textures {Texture[]} an array of {Texture} objects that make up the animation
+ * @param textures {PIXI.Texture[]|Object[]} an array of {@link PIXI.Texture} or frame objects that make up the animation
+ * @param textures[].texture {PIXI.Texture} the {@link PIXI.Texture} of the frame
+ * @param textures[].time {number} the duration of the frame in ms
  */
 function MovieClip(textures)
 {
-    core.Sprite.call(this, textures[0]);
+    core.Sprite.call(this, textures[0] instanceof core.Texture ? textures[0] : textures[0].texture);
 
     /**
      * @private
      */
-    this._textures = textures;
+    this._textures = null;
+
+    /**
+     * @private
+     */
+    this._durations = null;
+
+    this.textures = textures;
 
     /**
      * The speed that the MovieClip will play at. Higher is faster, lower is slower
@@ -107,9 +116,21 @@
         },
         set: function (value)
         {
-            this._textures = value;
-
-            this.texture = this._textures[Math.floor(this._currentTime) % this._textures.length];
+            if(value[0] instanceof core.Texture)
+            {
+                this._textures = value;
+                this._durations = null;
+            }
+            else
+            {
+                this._textures = [];
+                this._durations = [];
+                for(var i = 0; i < value.length; i++)
+                {
+                    this._textures.push(value[i].texture);
+                    this._durations.push(value[i].time);
+                }
+            }
         }
     },
 
@@ -123,7 +144,12 @@
     currentFrame: {
         get: function ()
         {
-            return Math.floor(this._currentTime) % this._textures.length;
+            var currentFrame = Math.floor(this._currentTime) % this._textures.length;
+            if (currentFrame < 0)
+            {
+                currentFrame += this._textures.length;
+            }
+            return currentFrame;
         }
     }
 
@@ -170,8 +196,7 @@
 
     this._currentTime = frameNumber;
 
-    var round = Math.floor(this._currentTime);
-    this._texture = this._textures[round % this._textures.length];
+    this._texture = this._textures[this.currentFrame];
 };
 
 /**
@@ -182,6 +207,7 @@
 MovieClip.prototype.gotoAndPlay = function (frameNumber)
 {
     this._currentTime = frameNumber;
+
     this.play();
 };
 
@@ -191,40 +217,59 @@
  */
 MovieClip.prototype.update = function (deltaTime)
 {
+    var elapsed = this.animationSpeed * deltaTime;
 
-    this._currentTime += this.animationSpeed * deltaTime;
-
-    var floor = Math.floor(this._currentTime);
-
-    if (floor < 0)
+    if (this._durations !== null)
     {
-        if (this.loop)
+        var lag = this._currentTime % 1 * this._durations[this.currentFrame];
+
+        lag += elapsed / 60 * 1000;
+
+        while (lag < 0)
         {
-            this._texture = this._textures[this._textures.length - 1 + floor % this._textures.length];
+            this._currentTime--;
+            lag += this._durations[this.currentFrame];
         }
-        else
-        {
-            this.gotoAndStop(0);
 
-            if (this.onComplete)
-            {
-                this.onComplete();
-            }
+        var sign = Math.sign(this.animationSpeed * deltaTime);
+        this._currentTime = Math.floor(this._currentTime);
+
+        while (lag >= this._durations[this.currentFrame])
+        {
+            lag -= this._durations[this.currentFrame] * sign;
+            this._currentTime += sign;
         }
+
+        this._currentTime += lag / this._durations[this.currentFrame];
     }
-    else if (this.loop || floor < this._textures.length)
+    else
     {
-        this._texture = this._textures[floor % this._textures.length];
+        this._currentTime += elapsed;
     }
-    else if (floor >= this._textures.length)
+
+    if (this._currentTime < 0 && !this.loop)
     {
-        this.gotoAndStop(this.textures.length - 1);
+        this.gotoAndStop(0);
 
         if (this.onComplete)
         {
             this.onComplete();
         }
     }
+    else if (this._currentTime >= this._textures.length && !this.loop)
+    {
+        this.gotoAndStop(this._textures.length - 1);
+
+        if (this.onComplete)
+        {
+            this.onComplete();
+        }
+    }
+    else
+    {
+        this._texture = this._textures[this.currentFrame];
+    }
+
 };
 
 /*
@@ -271,4 +316,4 @@
     }
 
     return new MovieClip(textures);
-};
+};
\ No newline at end of file

diff --git a/src/extras/MovieClip.js b/src/extras/MovieClip.js
index 9fc0ed2..4c5369f 100644
--- a/src/extras/MovieClip.js
+++ b/src/extras/MovieClip.js
@@ -19,16 +19,25 @@
  * @class
  * @extends PIXI.Sprite
  * @memberof PIXI.extras
- * @param textures {Texture[]} an array of {Texture} objects that make up the animation
+ * @param textures {PIXI.Texture[]|Object[]} an array of {@link PIXI.Texture} or frame objects that make up the animation
+ * @param textures[].texture {PIXI.Texture} the {@link PIXI.Texture} of the frame
+ * @param textures[].time {number} the duration of the frame in ms
  */
 function MovieClip(textures)
 {
-    core.Sprite.call(this, textures[0]);
+    core.Sprite.call(this, textures[0] instanceof core.Texture ? textures[0] : textures[0].texture);
 
     /**
      * @private
      */
-    this._textures = textures;
+    this._textures = null;
+
+    /**
+     * @private
+     */
+    this._durations = null;
+
+    this.textures = textures;
 
     /**
      * The speed that the MovieClip will play at. Higher is faster, lower is slower
@@ -107,9 +116,21 @@
         },
         set: function (value)
         {
-            this._textures = value;
-
-            this.texture = this._textures[Math.floor(this._currentTime) % this._textures.length];
+            if(value[0] instanceof core.Texture)
+            {
+                this._textures = value;
+                this._durations = null;
+            }
+            else
+            {
+                this._textures = [];
+                this._durations = [];
+                for(var i = 0; i < value.length; i++)
+                {
+                    this._textures.push(value[i].texture);
+                    this._durations.push(value[i].time);
+                }
+            }
         }
     },
 
@@ -123,7 +144,12 @@
     currentFrame: {
         get: function ()
         {
-            return Math.floor(this._currentTime) % this._textures.length;
+            var currentFrame = Math.floor(this._currentTime) % this._textures.length;
+            if (currentFrame < 0)
+            {
+                currentFrame += this._textures.length;
+            }
+            return currentFrame;
         }
     }
 
@@ -170,8 +196,7 @@
 
     this._currentTime = frameNumber;
 
-    var round = Math.floor(this._currentTime);
-    this._texture = this._textures[round % this._textures.length];
+    this._texture = this._textures[this.currentFrame];
 };
 
 /**
@@ -182,6 +207,7 @@
 MovieClip.prototype.gotoAndPlay = function (frameNumber)
 {
     this._currentTime = frameNumber;
+
     this.play();
 };
 
@@ -191,40 +217,59 @@
  */
 MovieClip.prototype.update = function (deltaTime)
 {
+    var elapsed = this.animationSpeed * deltaTime;
 
-    this._currentTime += this.animationSpeed * deltaTime;
-
-    var floor = Math.floor(this._currentTime);
-
-    if (floor < 0)
+    if (this._durations !== null)
     {
-        if (this.loop)
+        var lag = this._currentTime % 1 * this._durations[this.currentFrame];
+
+        lag += elapsed / 60 * 1000;
+
+        while (lag < 0)
         {
-            this._texture = this._textures[this._textures.length - 1 + floor % this._textures.length];
+            this._currentTime--;
+            lag += this._durations[this.currentFrame];
         }
-        else
-        {
-            this.gotoAndStop(0);
 
-            if (this.onComplete)
-            {
-                this.onComplete();
-            }
+        var sign = Math.sign(this.animationSpeed * deltaTime);
+        this._currentTime = Math.floor(this._currentTime);
+
+        while (lag >= this._durations[this.currentFrame])
+        {
+            lag -= this._durations[this.currentFrame] * sign;
+            this._currentTime += sign;
         }
+
+        this._currentTime += lag / this._durations[this.currentFrame];
     }
-    else if (this.loop || floor < this._textures.length)
+    else
     {
-        this._texture = this._textures[floor % this._textures.length];
+        this._currentTime += elapsed;
     }
-    else if (floor >= this._textures.length)
+
+    if (this._currentTime < 0 && !this.loop)
     {
-        this.gotoAndStop(this.textures.length - 1);
+        this.gotoAndStop(0);
 
         if (this.onComplete)
         {
             this.onComplete();
         }
     }
+    else if (this._currentTime >= this._textures.length && !this.loop)
+    {
+        this.gotoAndStop(this._textures.length - 1);
+
+        if (this.onComplete)
+        {
+            this.onComplete();
+        }
+    }
+    else
+    {
+        this._texture = this._textures[this.currentFrame];
+    }
+
 };
 
 /*
@@ -271,4 +316,4 @@
     }
 
     return new MovieClip(textures);
-};
+};
\ No newline at end of file
diff --git a/src/polyfill/Math.sign.js b/src/polyfill/Math.sign.js
new file mode 100644
index 0000000..dc957a2
--- /dev/null
+++ b/src/polyfill/Math.sign.js
@@ -0,0 +1,14 @@
+// References:
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign
+
+if (!Math.sign)
+{
+    Math.sign = function (x) {
+        x = +x;
+        if (x === 0 || isNaN(x))
+        {
+            return x;
+        }
+        return x > 0 ? 1 : -1;
+    };
+}

diff --git a/src/extras/MovieClip.js b/src/extras/MovieClip.js
index 9fc0ed2..4c5369f 100644
--- a/src/extras/MovieClip.js
+++ b/src/extras/MovieClip.js
@@ -19,16 +19,25 @@
  * @class
  * @extends PIXI.Sprite
  * @memberof PIXI.extras
- * @param textures {Texture[]} an array of {Texture} objects that make up the animation
+ * @param textures {PIXI.Texture[]|Object[]} an array of {@link PIXI.Texture} or frame objects that make up the animation
+ * @param textures[].texture {PIXI.Texture} the {@link PIXI.Texture} of the frame
+ * @param textures[].time {number} the duration of the frame in ms
  */
 function MovieClip(textures)
 {
-    core.Sprite.call(this, textures[0]);
+    core.Sprite.call(this, textures[0] instanceof core.Texture ? textures[0] : textures[0].texture);
 
     /**
      * @private
      */
-    this._textures = textures;
+    this._textures = null;
+
+    /**
+     * @private
+     */
+    this._durations = null;
+
+    this.textures = textures;
 
     /**
      * The speed that the MovieClip will play at. Higher is faster, lower is slower
@@ -107,9 +116,21 @@
         },
         set: function (value)
         {
-            this._textures = value;
-
-            this.texture = this._textures[Math.floor(this._currentTime) % this._textures.length];
+            if(value[0] instanceof core.Texture)
+            {
+                this._textures = value;
+                this._durations = null;
+            }
+            else
+            {
+                this._textures = [];
+                this._durations = [];
+                for(var i = 0; i < value.length; i++)
+                {
+                    this._textures.push(value[i].texture);
+                    this._durations.push(value[i].time);
+                }
+            }
         }
     },
 
@@ -123,7 +144,12 @@
     currentFrame: {
         get: function ()
         {
-            return Math.floor(this._currentTime) % this._textures.length;
+            var currentFrame = Math.floor(this._currentTime) % this._textures.length;
+            if (currentFrame < 0)
+            {
+                currentFrame += this._textures.length;
+            }
+            return currentFrame;
         }
     }
 
@@ -170,8 +196,7 @@
 
     this._currentTime = frameNumber;
 
-    var round = Math.floor(this._currentTime);
-    this._texture = this._textures[round % this._textures.length];
+    this._texture = this._textures[this.currentFrame];
 };
 
 /**
@@ -182,6 +207,7 @@
 MovieClip.prototype.gotoAndPlay = function (frameNumber)
 {
     this._currentTime = frameNumber;
+
     this.play();
 };
 
@@ -191,40 +217,59 @@
  */
 MovieClip.prototype.update = function (deltaTime)
 {
+    var elapsed = this.animationSpeed * deltaTime;
 
-    this._currentTime += this.animationSpeed * deltaTime;
-
-    var floor = Math.floor(this._currentTime);
-
-    if (floor < 0)
+    if (this._durations !== null)
     {
-        if (this.loop)
+        var lag = this._currentTime % 1 * this._durations[this.currentFrame];
+
+        lag += elapsed / 60 * 1000;
+
+        while (lag < 0)
         {
-            this._texture = this._textures[this._textures.length - 1 + floor % this._textures.length];
+            this._currentTime--;
+            lag += this._durations[this.currentFrame];
         }
-        else
-        {
-            this.gotoAndStop(0);
 
-            if (this.onComplete)
-            {
-                this.onComplete();
-            }
+        var sign = Math.sign(this.animationSpeed * deltaTime);
+        this._currentTime = Math.floor(this._currentTime);
+
+        while (lag >= this._durations[this.currentFrame])
+        {
+            lag -= this._durations[this.currentFrame] * sign;
+            this._currentTime += sign;
         }
+
+        this._currentTime += lag / this._durations[this.currentFrame];
     }
-    else if (this.loop || floor < this._textures.length)
+    else
     {
-        this._texture = this._textures[floor % this._textures.length];
+        this._currentTime += elapsed;
     }
-    else if (floor >= this._textures.length)
+
+    if (this._currentTime < 0 && !this.loop)
     {
-        this.gotoAndStop(this.textures.length - 1);
+        this.gotoAndStop(0);
 
         if (this.onComplete)
         {
             this.onComplete();
         }
     }
+    else if (this._currentTime >= this._textures.length && !this.loop)
+    {
+        this.gotoAndStop(this._textures.length - 1);
+
+        if (this.onComplete)
+        {
+            this.onComplete();
+        }
+    }
+    else
+    {
+        this._texture = this._textures[this.currentFrame];
+    }
+
 };
 
 /*
@@ -271,4 +316,4 @@
     }
 
     return new MovieClip(textures);
-};
+};
\ No newline at end of file
diff --git a/src/polyfill/Math.sign.js b/src/polyfill/Math.sign.js
new file mode 100644
index 0000000..dc957a2
--- /dev/null
+++ b/src/polyfill/Math.sign.js
@@ -0,0 +1,14 @@
+// References:
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign
+
+if (!Math.sign)
+{
+    Math.sign = function (x) {
+        x = +x;
+        if (x === 0 || isNaN(x))
+        {
+            return x;
+        }
+        return x > 0 ? 1 : -1;
+    };
+}
diff --git a/src/polyfill/index.js b/src/polyfill/index.js
index 3567efc..5e13c6a 100644
--- a/src/polyfill/index.js
+++ b/src/polyfill/index.js
@@ -1,2 +1,3 @@
 require('./Object.assign');
 require('./requestAnimationFrame');
+require('./Math.sign');