Spider-Man: No Way Home is a 2021 American superhero film based on the Marvel Comics character Spider-Man, co-produced by Columbia Pictures and Marvel Studios, and distributed by Sony Pictures Releasing. It is the sequel to Spider-Man: Homecoming (2017) and Spider-Man: Far From Home (2019), and the 27th film in the Marvel Cinematic Universe (MCU). The film was directed by Jon Watts and written by Chris McKenna and Erik Sommers. It stars Tom Holland as Peter Parker / Spider-Man alongside Zendaya, Benedict Cumberbatch, Jacob Batalon, Jon Favreau, Jamie Foxx, Willem Dafoe, Alfred Molina, Benedict Wong, Tony Revolori, Marisa Tomei, Andrew Garfield, and Tobey Maguire. In the film, Parker asks Dr. Stephen Strange (Cumberbatch) to use magic to make his identity as Spider-Man a secret again following its public revelation at the end of Far From Home. When the spell is corrupted because of Parker's actions, the multiverse is broken open, which allows visitors from alternate realities to enter Parker's universe.

A third MCU Spider-Man film was planned during the production of Homecoming in 2017. Negotiations between Sony and Marvel Studios to alter their deal—in which they produce the Spider-Man films together—ended with Marvel Studios leaving the project in August 2019, but a negative fan reaction led to a new deal between the companies a month later. Watts, McKenna, Sommers, and Holland were set to return, and filming took place from October 2020 to March 2021 in New York City and Atlanta. No Way Home serves as a crossover between the MCU and the Spider-Man films directed by Sam Raimi and Marc Webb, featuring several actors reprising their roles from those films, including previous Spider-Man actors Maguire and Garfield. The involvement of both actors was the subject of wide speculation and numerous leaks despite the efforts of Sony, Marvel, and the cast to conceal their involvement.

Spider-Man: No Way Home premiered at the Fox Village Theatre in Hollywood, Los Angeles, on December 13, 2021, and was theatrically released in the United States on December 17, as part of Phase Four of the MCU. The film received positive reviews from critics and grossed over $1.9 billion worldwide, surpassing its predecessor as the highest-grossing film released by Sony Pictures. It became the highest-grossing film of 2021, the sixth-highest-grossing film of all time, the highest grossing Spider-Man film, and set several other box office records, including those for films released during the COVID-19 pandemic. The film received a nomination for Best Visual Effects at the 94th Academy Awards, among numerous other accolades. An extended version of the film, subtitled The More Fun Stuff Version, had a global theatrical release in September 2022. A sequel is in development.