Avengers: Infinity War and its untitled sequel are upcoming American superhero films based on the Marvel Comics superhero team the Avengers, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. They are intended to be the sequels to Marvel's The Avengers (2012) and Avengers: Age of Ultron (2015), and to serve as the nineteenth and twenty-second films of the Marvel Cinematic Universe (MCU) respectively. Both films are directed by Anthony and Joe Russo from screenplays by Christopher Markus & Stephen McFeely, and feature an ensemble cast composed of many previous MCU actors.
Development of the films began in Marvel Studios' early films by introducing the Infinity Stones and the Infinity Gauntlets. Casting began in mid-2013 with Robert Downey, Jr. signing on to reprise his role as Tony Stark / Iron Man, with the films officially announced a year later as Avengers: Infinity War – Part 1 and Avengers: Infinity War – Part 2. The Russo brothers and Markus and McFeely joined the project in early 2015. In July 2016, Marvel revealed that the Part 1 and Part 2 of the titles would be removed, with the former first part known simply as Avengers: Infinity War and the former second part to be renamed at a later time. Back-to-back production on the films began on January 23, 2017, at Pinewood Atlanta Studios in Fayette County, Georgia, with additional filming scheduled to take place in Scotland. It will be the first films to be shot entirely in IMAX, using a new 2D digital camera developed alongside Arri.