Blake Lively has revealed she worked out 13 hours a day to get in shape for her latest movie.
The Gossip Girl actress stars in action-horror flick The Shallows, which sees her character lost at see fighting off a killer shark.
Blake, 28, revealed that she had her “butt kicked” during the shoot.
“I had an amazing trainer. I was fortunate to have Don Saladino help me out and he just kicked my butt in the best way, in the most healthy way,” she told Entertainment Tonight.
“Being in waves like that, swimming like that, doing such long takes like that all the time – I became so much stronger and more fit by the end of production,” she explained.
“I was working out 13 hours a day because shooting was working out.
“It was neat to be able to do that, and it was neat to have that challenge after having a baby, because you think your body is so different – you think no matter what, it’s never [going to be] totally be the same,” she added.
