The Imaginarium of Doctor Parnassus is an upcoming fantasy film directed by Terry Gilliam and written by Gilliam and Charles McKeown. The film follows the leader of a travelling theatre troupe who, having made a deal with the Devil, takes audience members through a magical mirror to explore their imaginations.

Christopher Plummer, Tom Waits, and Heath Ledger star in the film, though Ledger's death one-third of the way through filming caused production to be temporarily suspended. Ledger's role was recast with Johnny Depp, Jude Law, and Colin Farrell portraying transformations of Ledger's character Tony as he travels through a dream world.

The film's world premiere was during the 62nd Cannes Film Festival, out of competition. The projected theatrical release date is June 6, 2009. The film received a PG-13 rating for "violent images, some sensuality, language and smoking."