However, Christina and Olivia are both denying that it's actually them in the pictures.
Christina's rep tells TMZ, the "Mad Men" star's phone WAS indeed hacked recently ... and multiple self-shots were stolen -- including several showing a busty Hendricks barely dressed, without make-up, presumably at home.
But the rep insists, the one topless picture -- purportedly showing the actress' bare ample bosom -- is NOT Christina. It's an impostor.
As far as Olivia Munn, she's saying the same thing. The Magic Mike actress admits that several shots are her, and some of them were posted on her blog - but NOT the nude photos!
Olivia and Christina were both hacked within hours of each other. You can check out the photos in our gallery and judge for yourself!