Stylish Gossip Girl star Taylor Momsen walked the streets on the New York City set of the hit CW show yesterday. Here are some shots of the actress and aspiring model who plays Little J ... and who just turned 15 in July. 15!

We can't wait to see what's in store for Jenny on Gossip Girl.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.