Robert Downey Jr. and Timothée Chalamet Coin 'Dunesday' for December 2026 Film Releases

Actors Robert Downey Jr. and Timothée Chalamet have coined the term 'Dunesday' to describe the simultaneous December 18, 2026, release of their highly anticipated films, Avengers: Doomsday and Dune: Part Three. The playful nickname was shared during a special screening of Chalamet's film Marty Supreme in Los Angeles. This planned box office event aims to replicate the cultural impact of the 2023 'Barbenheimer' phenomenon, where Barbie and Oppenheimer premiered together, generating significant audience excitement.