updated 04/24/2012 AT 8:00 AM ET
•originally published 04/24/2012 AT 10:45 AM ET
Reprising her role as the butt-kicking Black Widow in The Avengers, Scarlett Johansson had her own butt to worry about. Namely, how it looked in her skin-tight, curve-hugging costume.
“First of all, every woman has body worries. I’m not exempt from that,” she tells ITV1’s Daybreak morning show in the U.K. on Tuesday.
“But beyond part of the by-product of spending that much time in the gym is that you can fit into a cat suit.”
But those workouts weren’t all about her hot bod. Johansson, 27, who’s promoting the latest installment of the superhero franchise, in theaters May 4, says she performed her own stunts in the movie as she worked with stunt-double Heidi Moneymaker, which was “a lot of training and dedication.”