On Thursday's episode of "The Ellen DeGeneres Show," the talk show host gives Scarlett Johansson the scare of her life with a surprise appearance from Chris Evans.
Before the prank, the actress talks about how much testosterone was around her on the set of "Avengers: Age of Ultron" set, admitting that she surrounds herself with "an army of women," like Cobie Smulders and Elizabeth Olsen.
She jokes that the men are "very delicate" ... [Chris] Hemsworth's hair takes much longer than mine."
ScarJo continues to talk about her hunky costars, including Evans, whom she says she knows "very well. Too well, I'm sure."
Cut to the big moment ... the actor then grabs onto Scarlett's chair and shouts "SCARLETT!"
Check out the clip above to see her priceless reaction!
After Scarlett calms down, Ellen puts her Chris knowledge to the test in a game of "Avenger? I Hardly Know Her."
The comedienne asks her questions about his directorial debut, his favorite type of apple (which he is eating shirtless!) and his job at Disneyland (shirtless again!).
The actor is quizzed on his costar's twins, her crepe-cooking skills and her love of karaoke.
Watch the video to see if these stars really know each other!
Earlier in the show, the actress talks about life as a new mom and how she filmed most of "Avengers" with a baby bump in tow.
"I actually shot this film while I was pretty pregnant," she tells Ellen. "I was really happy to be working. I never thought I would be working in that, ya know, condition."
"I was big. I was pretty big," the blonde beauty adds. "How did they hide that?" the talk show host asks. "Um, it just magically went away," Scarlett replies.
Check out the clip to hear more about how they got around her pregnancy!