Leighton Meester is Jason Wu Whimsical

Leighton Meester (in Jason Wu) attends a screening of Sex Drive on Sunday night with co-star Taylor Momsen and boyfriend Sebastian Stan.

The 22-year-old Gossip Girl rubbed shoulders with Sex Drive stars James Marsden, Seth Green and Katrina Bowden on the red carpet.

According to PopWrap, Leighton and her Kings star-boyfriend were spotted at the after-party making out in a room full of journalists throughout the night. Kissy, kissy!

And good news! Gossip Girl was picked up for an additional two episodes this season, according to EW.

10+ pictures of Leighton Meester at the Sex Drive screening…