Blake Lively was all smiles as she sported yet another fashionable outfit while heading to the set on a sunny Thursday morning in New York City.

According to a source on the scene, the "Gossip Girl" star "walked with a group of girls that waited to take some photos with her and were all smiles as they walked up Park Avenue together."

In related news, Blake has a new co-star on her hit show, as Willa Holland showed up for her first day of the job yesterday.

Press reports tell that "Willa is scheduled to play Agnes, a teen model who befriends Jenny and then shows her the allure of The Dark Side - rumors involve threesomes and stripteases."

Gossip Girls

Enjoy the pictures of Blake Lively on the set of "Gossip Girl" (September 17).