MirrorMask is a 2005 British-American dark fantasy film designed and directed by Dave McKean, and written by Neil Gaiman from a story they developed together. Produced by The Jim Henson Company, the film stars Stephanie Leonidas, Jason Barry, Rob Brydon, and Gina McKee.

Gaiman and McKean worked on the film concepts over the course of two weeks at Jim Henson's family's home. Production took seventeen months on a budget of $4 million. Initially intended for the direct-to-video market, MirrorMask premiered at the 2005 Sundance Film Festival before receiving a limited theatrical run in the United States on September 30, 2005. Critical reaction was mixed, with praise for the visuals but criticism towards the story and script.