Phase Four of the Marvel Cinematic Universe (MCU) is a group of American superhero films and television series produced by Marvel Studios based on characters that appear in publications by Marvel Comics. The MCU is the shared universe in which all of the films and series are set. The phase was the first to include television series from Marvel Studios, with the studio developing several event series for the streaming service Disney+. The franchise also expanded to animation, from Marvel Studios Animation, and to television specials marketed as "Marvel Studios Special Presentations". The phase began in January 2021 with the premiere of the series WandaVision and concluded in November 2022 with the release of the television special The Guardians of the Galaxy Holiday Special. The COVID-19 pandemic impacted work on the phase, leading to various schedule changes.