Madchen Amick
Credit: Jeffrey Mayer/WireImage

The Upper East Side is about to get its very own Mrs. Robinson! On next season’s Gossip Girl, a sizzling cougar named Catherine Mason will tempt young Nate (Chace Crawford) with a little May-December love. She’ll be played by Madchen Amick, last seen in CBS’ Viva Laughlin as the wife of a small-time casino owner. Amick will join the cast when Girl returns to the CW on Sept. 1.

addCredit(“Jeffrey Mayer/WireImage”)