diff --git a/spine-tk2d/Assets/Spine/SkeletonAnimation.cs b/spine-tk2d/Assets/Spine/SkeletonAnimation.cs
index 36a04fe19..5c9cd68f6 100644
--- a/spine-tk2d/Assets/Spine/SkeletonAnimation.cs
+++ b/spine-tk2d/Assets/Spine/SkeletonAnimation.cs
@@ -37,7 +37,10 @@ using Spine;
 public class SkeletonAnimation : SkeletonComponent {
 	public bool loop;
 	public Spine.AnimationState state;
-	
+
+	public delegate void UpdateBonesDelegate(SkeletonAnimation skeleton);
+	public UpdateBonesDelegate UpdateBones;
+
 	public String _animationName;
 	public String animationName {
 		get {
@@ -67,6 +70,8 @@ public class SkeletonAnimation : SkeletonComponent {
 		// Apply the animation.
 		state.Update(deltaTime * timeScale);
 		state.Apply(skeleton);
+		
+		if (UpdateBones != null) UpdateBones(this);
 
 		// Call overridden method to call skeleton Update and UpdateWorldTransform.
 		base.UpdateSkeleton(deltaTime);
diff --git a/spine-unity/Assets/Spine/SkeletonAnimation.cs b/spine-unity/Assets/Spine/SkeletonAnimation.cs
index d71460983..fb5971fcb 100644
--- a/spine-unity/Assets/Spine/SkeletonAnimation.cs
+++ b/spine-unity/Assets/Spine/SkeletonAnimation.cs
@@ -38,6 +38,9 @@ public class SkeletonAnimation : SkeletonComponent {
 	public bool loop;
 	public Spine.AnimationState state;
 
+	public delegate void UpdateBonesDelegate(SkeletonAnimation skeleton);
+	public UpdateBonesDelegate UpdateBones;
+
 	public String _animationName;
 	public String animationName {
 		get {
@@ -68,6 +71,8 @@ public class SkeletonAnimation : SkeletonComponent {
 		state.Update(deltaTime * timeScale);
 		state.Apply(skeleton);
 
+		if (UpdateBones != null) UpdateBones(this);
+
 		// Call overridden method to call skeleton Update and UpdateWorldTransform.
 		base.UpdateSkeleton(deltaTime);
 	}