Crystal is a female tufted capuchin and animal actress, acquired and trained by Birds & Animals Unlimited, Hollywood's largest supplier of animals. Her acting career began as a baby monkey in Disney's 1997 film George of the Jungle. She has portrayed monkey Dexter in the Night at the Museum franchise, a drug-dealing monkey in The Hangover Part II, and pet monkey Bennie in Steven Spielberg's 2022 semi-autobiographical film The Fabelmans. In 2012, she played Dr. Rizzo on the sitcom Animal Practice.