Lively appears in a bikini for the majority of her newest film, "The Shallows," and she admitted to Australia's Herald Sun that it wasn't so easy.
"The struggle is that I am doing a movie in a bikini eight months after having a baby and there is a level of insecurity and vanity that comes with that,” she confessed.
But Lively, who has spoken out about positive body image before, also fessed up to the unfair expectations Hollywood perpetuates.
Despite being in tip-top shape in time for the film, Lively said it's "a shame because there shouldn’t be that negative ‘ugh’ after someone has a baby. Your body is so beautiful."
"You couldn’t walk a Victoria’s Secret runway but it’s beautiful in a completely different and incredible way and I do wish I had the bravery to go out there and represent women as they actually look,” she added.