The comic book ensemble film brings together Marvel's biggest heroes - including Iron Man (Robert Downey Jr), Hulk (Mark Ruffalo), Black Widow (Scarlett Johansson) and Hawkeye (Jeremy Renner) - to fight off an invasion from Loki (Tom Hiddleston) and his alien army.
"All I can say is that I had to fight someone else in this film, and they beat the crap out of me in stunt rehearsals. I have to say I could not believe it," she said.
"I was like, 'Can you hold it back, okay? You know, I'm trying to work it out here. I've got smaller muscles than you'. I was dragged across the [floor]. When we finally finished [filming] that scene, I was just happy to be alive."