Avengers: Infinity War is an upcoming American superhero film based on the Marvel Comics superhero team the Avengers, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. It is intended to be the sequel to 2012's Marvel's The Avengers and 2015's Avengers: Age of Ultron and the nineteenth film installment in the Marvel Cinematic Universe (MCU). The film is directed by Anthony and Joe Russo, with a screenplay by Christopher Markus & Stephen McFeely, and features an ensemble cast that includes Robert Downey Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Sebastian Stan, Benedict Cumberbatch, Paul Bettany, Cobie Smulders, Benedict Wong, Zoe Saldana, Karen Gillan, Vin Diesel, Dave Bautista, Bradley Cooper, Pom Klementieff, Scarlett Johansson, Benicio del Toro, Tom Holland, Anthony Mackie, Chadwick Boseman, Danai Gurira, Paul Rudd, and Don Cheadle. In Avengers: Infinity War, the Avengers join forces with the Guardians of the Galaxy to confront Thanos, who is trying to amass the Infinity Stones.
The film was announced in October 2014 as Avengers: Infinity War – Part 1. The Russo brothers came on board to direct in April 2015 and by May, Markus and McFeely signed on to write the script for the film. In July 2016, Marvel shortened the titled to Avengers: Infinity War. Filming began in January 2017, at Pinewood Atlanta Studios in Fayette County, Georgia, and lasted until July 2017, shooting back-to-back with a direct sequel. Additional filming took place in Scotland, England, the Downtown Atlanta area and New York City.

Avengers: Infinity War is scheduled to be released in the United States on May 4, 2018, in IMAX and 3D. An untitled sequel is scheduled to be released on May 3, 2019.