Iron Man 2 is a 2010 American superhero film based on the Marvel Comics character Iron Man. Produced by Marvel Studios and distributed by Paramount Pictures, it is the sequel to Iron Man (2008) and the third film in the Marvel Cinematic Universe (MCU). Directed by Jon Favreau and written by Justin Theroux, the film stars Robert Downey Jr. as Tony Stark / Iron Man alongside Gwyneth Paltrow, Don Cheadle, Scarlett Johansson, Sam Rockwell, Mickey Rourke, and Samuel L. Jackson. Set six months after the events of Iron Man, the film follows Tony Stark as he resists calls from the United States government to hand over the Iron Man technology, which is causing his declining health. Meanwhile, Russian scientist Ivan Vanko (Rourke) uses his own version of the technology to pursue a vendetta against the Stark family.

Development on a sequel to Iron Man began in May 2008 after the success of the first film. In July, Theroux was hired to write the script and Favreau was signed to return as director. Downey, Paltrow, and Jackson were set to reprise their roles from Iron Man, while Cheadle was brought in to replace Terrence Howard in the role of James Rhodes. In early 2009, Rourke (Vanko), Rockwell, and Johansson filled out the supporting cast. Filming took place from April to July 2009, mostly in California as in the first film, except for a key sequence in Monaco. Unlike its predecessor, which mixed digital and practical effects, the sequel primarily relied on computer-generated imagery to create the Iron Man suits.

Iron Man 2 premiered at the El Capitan Theatre in Hollywood, Los Angeles, on April 26, 2010, and was released in the United States on May 7, as part of Phase One of the MCU. It received praise for its action sequences and performances, although critics deemed it inferior to the first film. The film grossed over $623.9 million at the worldwide box office, making it the seventh-highest-grossing film of 2010. It received an Academy Award nomination for Best Visual Effects. A sequel, Iron Man 3, was released on May 3, 2013.