12 Cameos We Were Waiting For - And Finally Got

List Rules
Vote up the most satisfying cameos that were a long time coming.

The best celebrity cameos from movies and TV are the ones that just make perfect sense. The idea of a cameo itself has transcended the idea of being a funny "add-on" and has become its own punchline of sorts. It can also be used to surprise the audience or may simply exist because an actor had nothing better to do. But some cameos are so extremely well thought out that when they happen, it hits you like a ton of bricks, realizing you were set up for an elaborate climax of a subtle joke. 

These are the best television and movie cameos that had a long build-up but finally paid off in the most satisfying way.