The Marvel Cinematic Universe is a media franchise and shared fictional universe that is the setting of superhero films produced by Marvel Studios, based on characters that appear in Marvel Comics publications. Phase One of the franchise includes six films, featuring four different superhero properties, leading up to a crossover in the 2012 film Marvel's The Avengers. The franchise's Phase Two features three sequels to Phase One films, as well as two new film properties, and the crossover Avengers: Age of Ultron, which released in 2015. Phase Three features four sequels to earlier films, and four new film properties, as well as the crossover films Avengers: Infinity War (2018) and Avengers: Endgame (2019). The films from Phase One through Phase Three are collectively known as "The Infinity Saga". As the franchise is composed of films adapted from a variety of Marvel Comics properties, there are multiple lead actors: Robert Downey Jr. stars as Tony Stark / Iron Man in the films Iron Man (2008), Iron Man 2 (2010), and Iron Man 3 (2013); Chris Evans portrays Steve Rogers / Captain America in Captain America: The First Avenger (2011), Captain America: The Winter Soldier (2014), and Captain America: Civil War (2016), where he is joined by Downey as Stark; and Chris Hemsworth plays Thor in Thor (2011), Thor: The Dark World (2013), and Thor: Ragnarok (2017). All three actors star in The Avengers (2012), and reprise their roles in Avengers: Age of Ultron (2015), Avengers: Infinity War (2018), and Avengers: Endgame (2019). Edward Norton headlined The Incredible Hulk (2008), playing Bruce Banner / Hulk, but did not reprise the role in future films, being replaced by Mark Ruffalo for all subsequent films involving the character. Chris Pratt portrays the lead character, Peter Quill / Star-Lord, in Guardians of the Galaxy (2014), and returns for its sequel, Guardians of the Galaxy Vol. 2 (2017), while Paul Rudd and Michael Douglas respectively star as Scott Lang / Ant-Man and Hank Pym / Ant-Man in Ant-Man (2015) and Ant-Man and the Wasp (2018), in which Evangeline Lilly co-stars as Hope van Dyne / Wasp. Benedict Cumberbatch portrays Stephen Strange in Doctor Strange (2016), Tom Holland portrays Peter Parker / Spider-Man in Spider-Man: Homecoming (2017) and Spider-Man: Far From Home (2019), and Chadwick Boseman portrayed T'Challa / Black Panther in Black Panther (2018); Holland and Boseman were both introduced in Captain America: Civil War, which