Ant-Man and the Wasp: Quantumania is a 2023 American superhero film based on Marvel Comics featuring the characters Scott Lang / Ant-Man and Hope Pym / Wasp. Produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures, it is the sequel to Ant-Man (2015) and Ant-Man and the Wasp (2018) and the 31st film of the Marvel Cinematic Universe (MCU). The film was directed by Peyton Reed, written by Jeff Loveness, and stars Paul Rudd as Scott Lang and Evangeline Lilly as Hope van Dyne, alongside Jonathan Majors, Kathryn Newton, David Dastmalchian, Katy O'Brian, William Jackson Harper, Bill Murray, Michelle Pfeiffer, Corey Stoll, and Michael Douglas. In the film, Lang and Van Dyne are transported to the Quantum Realm along with their family and face Kang the Conqueror (Majors).  

Plans for a third Ant-Man film were confirmed in November 2019, with Reed and Rudd returning. Loveness was hired by April 2020, with development on the film beginning during the COVID-19 pandemic. The film's title and new cast members were announced in December 2020. Filming in Turkey began in early February 2021, while additional filming occurred in San Francisco in mid-June, ahead of principal photography starting at the end of July at Pinewood Studios in Buckinghamshire and ending in November.  

Ant-Man and the Wasp: Quantumania premiered in Los Angeles on February 6, 2023, and was released in the United States on February 17, 2023, as the first film in Phase Five of the MCU. It received mixed reviews from critics, who praised the performances (particularly those of Rudd, Majors, and Pfeiffer) and visuals, but criticized the writing and inconsistent tone. The film has grossed over $303 million worldwide, becoming the third highest-grossing film of 2023.