Eternals is a 2021 American superhero film based on the Marvel Comics race the Eternals. Produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures, it is the 26th film in the Marvel Cinematic Universe (MCU). The film was directed by Chloé Zhao, who wrote the screenplay with Patrick Burleigh, Ryan Firpo, and Kaz Firpo. It stars an ensemble cast including Gemma Chan, Richard Madden, Kumail Nanjiani, Lia McHugh, Brian Tyree Henry, Lauren Ridloff, Barry Keoghan, Don Lee, Kit Harington, Salma Hayek, and Angelina Jolie. In the film, the Eternals, immortal alien beings, emerge from hiding after thousands of years to protect Earth from their ancient counterparts, the Deviants.

In April 2018, Marvel Studios president Kevin Feige announced that a film based on the Eternals was in development and would explore the group as ancient aliens living throughout human history. Ryan and Kaz Firpo were hired to write the script, and Zhao was set to direct in September. She was given significant creative freedom to rewrite the script, taking particular inspiration from Terrence Malick's films, and to use more locations and natural lighting than previous MCU films had. Casting began in early 2019 and Burleigh joined to work on the script ahead of principal photography, which took place from July 2019 to February 2020 at Pinewood Studios and on location in England and the Canary Islands.

Eternals premiered at the Dolby Theatre in Hollywood, Los Angeles, on October 18, 2021, and was released in the United States on November 5 as part of Phase Four of the MCU. The film grossed $402 million worldwide and received some awards and nominations, but it also became the first MCU film to not receive generally positive reviews. Particular criticism went to the screenplay and pacing, with commentators feeling it did not live up to Zhao's previous work or to previous MCU films. It received some praise for its themes and visuals.