Robert Downey Jr., Chris Evans, Mark Ruffalo, and Chris Hemsworth appear together in which of these films?

"The Avengers" ("Marvel's The Avengers") is a 2012 American superhero film, based on the 'Marvel Comics' superhero team of the same name. Produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures, it is the sixth film in the Marvel Cinematic Universe (MCU). Written and directed by Joss Whedon, the film features an ensemble cast including Robert Downey Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, and Jeremy Renner as the Avengers. In additional roles, there are Tom Hiddleston, Stellan Skarsgård, and Samuel L. Jackson. In the film, Nick Fury and the spy agency S.H.I.E.L.D. recruit Tony Stark, Steve Rogers, Bruce Banner, Thor, Natasha Romanoff, and Clint Barton to form a team capable of stopping Thor's brother Loki from subjugating the planet Earth.

"The Avengers" premiered at the El Capitan Theatre in Los Angeles in April 2012, and was released in the USA in May, as the final film in Phase One of the MCU. This film received praise for Whedon's direction and screenplay, visual effects, action sequences, acting by Evans, Ruffalo, Hemsworth, and Scarlett Johansson, and the musical score. The film grossed over $1.5 billion worldwide on a budget of $220–225 million, setting numerous box office records and becoming the third-highest-grossing film of all time at the time of its release and the highest-grossing film of 2012.