The actress sizzled on the red carpet at the premiere for new film Arrival in a tantalising toga-style gown.
But while the bottom half of the floor-length number may have been modest, there wasn't much to the top. Literally.
The redhead narrowly avoided a full-blown boob spillage as she posed for pictures with her hand on her hip.
At one point she even spotted her assets making a bid for freedom and had to pause to readjust herself.
Amy teamed the butterfly-print ensemble with gold earrings, a glossy pout and golden eyeshadow.
She wore her auburn tresses in loose, cascading curls – channeling classic Hollywood screen siren.
Amy plays a linguistics professor working with the US government to decipher the language of aliens in the sci-fi flick.
She explained that she felt the film was especially relevant given the tumultuous state of global politics.
"We started filming over a year ago and now I feel with everything going on in the world, throughout Europe and the politics that are happening in the States right now, there is so much fear," she said.
