Dumb and Dumberer: When Harry Met Lloyd is a 2003 American buddy comedy film directed by Troy Miller from a screenplay by Miller and Robert Brener. It is the second installment in the Dumb and Dumber franchise and a prequel to the 1994 film Dumb and Dumber. Depicting the original film's characters during their high school years, it stars Derek Richardson and Eric Christian Olsen in the title roles. The film was a moderate box office success, but was panned by critics, who compared it unfavorably with the original.

Dumb and Dumber is a 1994 American buddy comedy film directed by Peter Farrelly, who cowrote the screenplay with Bobby Farrelly and Bennett Yellin. It is the first installment in the Dumb and Dumber franchise. Starring Jim Carrey and Jeff Daniels, it tells the story of Lloyd Christmas (Carrey) and Harry Dunne (Daniels), two dumb but well-meaning friends from Providence, Rhode Island, who set out on a cross-country trip to Aspen, Colorado, to return a briefcase full of money to its owner, thinking it was abandoned as a mistake though it was actually left as a ransom. Lauren Holly, Karen Duffy, Mike Starr, Charles Rocket, and Teri Garr play supporting roles.