Kristen Bell was not in The Hangover Part 2, but Crystal the monkey stole the movie.

By May 31, 2011 2:25 pm ET

LOS ANGELES, CA – MAY 19: Crystal (L) and actress Kristen Bell arrives at the premiere of Warner Bros. “The Hangover Part II” held at Grauman’s Chinese Theatre on May 19, 2011 in Los Angeles, California. (Photo by Alberto E. Rodriguez/Getty Images)