Crystal the Monkey is a female capuchin monkey and animal actress. She made her film debut in 1997’s George of the Jungle, and has since appeared in over 20 films, including American Pie, Night at the Museum, and more recently, as a drug dealing monkey in The Hangover: Part II, and a wise-cracking one voiced by Adam Sandler in The Zookeeper. Crystal lives with her handler and trainer, Tom Gunderson.