Taylor Momsen & Mischa Barton: BFFs!

Gossip Girl starlet Taylor Momsen and former OC star Mischa Barton hang out together at a cocktail party in honor of designer Kris Van Assche, hosted by GQ & Dior Homme at The Cooper Square Hotel Penthouse in New York City on Tuesday (September 8).

Taylor, 16, has been focusing on her music lately with her band, The Pretty Reckless, and just landed a gig at the next Teen Vogue party!

15+ pictures inside of BFFs Taylor Momsen and Mischa Barton…