Ace Ventura: Pet Detective is a 1994 American comedy film starring Jim Carrey as Ace Ventura, an animal detective who is tasked with finding the abducted dolphin mascot of the Miami Dolphins football team. The film was directed by Tom Shadyac, who wrote the screenplay with Jack Bernstein and Carrey. The film co-stars Courteney Cox, Tone Loc, Sean Young, and then–Miami Dolphins quarterback Dan Marino and features a cameo appearance from death metal band Cannibal Corpse.

Morgan Creek Productions produced the film on a budget of $15 million, and Warner Bros. released the film in February 1994. It grossed $72.2 million in the United States and Canada and $35 million in other territories for a worldwide total of $107.2 million. It received mixed reviews from critics. Carrey's performance led to the film having a cult following among male adolescents. In addition to launching Carrey's film career, it also started a franchise, spawning the sequel film Ace Ventura: When Nature Calls (1995), the animated television series Ace Ventura: Pet Detective (1995–2000), and later, standalone made-for-television sequel Ace Ventura Jr.: Pet Detective (2009).