Kangaroo Jack is a 2003 American buddy action comedy film directed by David McNally from a screenplay by Steve Bing and Scott Rosenberg with a story by Bing and Barry O'Brien. It is also produced by Jerry Bruckheimer with music by Trevor Rabin. The film tells the story of two childhood friends who get caught up with the mob and are forced to deliver $50,000 to Australia, but things go haywire when the money is lost to a wild kangaroo. It stars Jerry O'Connell, Anthony Anderson, Estella Warren, Michael Shannon, and Christopher Walken, with Adam Garcia as the uncredited voice of the titular character.

Originally conceived as an R-rated mob comedy entitled Down and Under, negative test screenings led Bruckheimer to retool the film into a PG-rated film, heavily re-editing the film and adding scenes of an anthropomorphic kangaroo.

Kangaroo Jack was released in the United States on January 17, 2003, by Warner Bros. Pictures. The film was strongly panned by critics, who criticized the screenplay, humor, violence, and innuendoes, as well as its false advertising as a family film with the kangaroo in a significant speaking role, although the visuals and soundtrack were praised. It grossed $88.1 million worldwide on a $60 million budget.

An animated sequel titled Kangaroo Jack: G'Day U.S.A.! was produced and released direct-to-video in 2004.