Lily Collins: 'Seventeen' Magazine Cover Signing!

Lily Collins is all smiles as she attends her Seventeen Magazine September Cover Issue Celebration held at Barnes & Noble Union Square on Tuesday (August 6) in New York City.

The 24-year-old Mortal Instruments: City of Bones actress looked stunning in a Thakoon top and Christian Louboutin pumps.

PHOTOS: Check out the latest pics of Lily Collins

The night before, Lily stepped out for the Meet The Filmmakers event held at the Apple Store Soho before stopping by Late Night with Jimmy Fallon.

15+ pics inside of Lily Collins at Barnes & Noble…