Jeremy Renner as Clint Barton/Hawkeye, Don Cheadle as James Rhodes/War Machine, Robert Downey Jr as Tony Stark/Iron Man, Chris Evans as Steve Rogers/Captain America, Karen Gillan as Nebula, Rocket Raccoon (Bradley Cooper), Paul Rudd as Scott Lang/Ant-Man and Scarlett Johansson as Natasha Romanoff/Black Widow