Dianna Agron

You'll never guess which stars once shared spaces with the likes of Justin Timberlake, Kristen Stewart, and Robert Downey Jr...

Dianna Agron, who plays Quinn Fabray on Glee, is on the cover of the September issue of Cosmopolitanlooking nothing like her on-screen self.  Inside the mag, Agron reveals why she stays mum on her dating life, despite rumors of a timultious (and possibly abusive) relationship with I Am Number Four co-star Alex Pettyfer and -- much more serene -- new relationship with Gossip Girl's Sebastian Stan..