"I think a woman's body after having a baby is pretty amazing," she told Sunrise. "You don't have to have be Victoria's Secret-ready right away. You've just done this incredible miracle that life has to offer.
"You gave birth to a human being. I would really like to see that celebrated," she added.
Speaking about her new film The Shallows, she says she had to undergo a grueling workout regime for the action-packed film in which she plays a medical student who is attacked by a great white shark.
"This movie was a physical challenge as much as it was an acting challenge,” she said. “I had to do a lot of endurance training. This was eight months after I had had a baby."
Watch the trailer for The Shallows below: