Chace Crawford & Katie Cassidy: Kissing Couple!

Chace Crawford and his co-star Katie Cassidy share a passionate kiss on the streets of New York City on Wednesday (August 11).

Lucky girl!!!

Off-screen couple (and co-stars) Blake Lively and Penn Badgley were also seen shooting scenes.

Later in the evening, Chace came out to celebrate nightlife king Noah Tepperberg‘s birthday party at NYC hotspot Avenue. Other celebs to come out for the big bash: model Jessica White, basketball star LeBron James, and actor Wilmer Valderrama.

Happy Birthday, Noah!!!