Zoe Kazan in Revolutionary Road (2008)
This scene placed 13th among our Top Nude Scenes of 2008, although she was an unknown at the time, and it’s just a brief topless flash. (That little .gif in the above link is the whole scene.) Given that this scene is a nothing burger, I guess our voters really liked her.
Zoe is still acting these days, but is also establishing a reputation as a screenwriter and playwright.