Original Australian Flyer movie poster. Dumb and Dumber is a 1994 American buddy comedy road film starring Jim Carrey and Jeff Daniels. It was written by the Farrelly brothers and Bennett Yellin, and is the Farrelly brothers' directorial debut. The film was released on December 16, 1994. It grossed $247 million at the box office and has developed a cult following in the years since its release.The success of Dumb and Dumber launched the career of the Farrelly brothers and solidified Carrey's.The film also spawned an animated TV series, a 2003 prequel, and a 2014 sequel.