The Zero Theorem is a 2013 science fiction film directed by Terry Gilliam, starring Christoph Waltz, David Thewlis, Mélanie Thierry and Lucas Hedges. Written by Pat Rushin, the story is about Qohen Leth (Waltz), a reclusive computer genius tasked with solving a formula that will determine whether life holds meaning. The film began production in October 2012.

Gilliam has given conflicting statements about whether The Zero Theorem is meant as the third part of a satirical dystopian trilogy ("Orwellian triptych") that began with 1985's Brazil and continued with 1995's 12 Monkeys.