Lily Collins & Jamie Campbell Bower: 'City of Bones' Philly Signing!

Lily Collins is the center of attention while posing with co-star Jamie Campbell Bower and author Cassandra Clare while promoting her upcoming film The Mortal Instruments: City of Bones at the Franklin Mills Mall on Friday (August 2) in Philadelphia, Penn.

The 24-year-old actress and the 24-year-old actor were seen signing autographs and posing for pics with fans, who lined up for them.

PHOTOS: Check out the latest pics of Lily Collins

Earlier in the day, Lily and Jamie promoted the flick at the Good Day studios.

FYI: Lily is wearing top and shorts by Maxime Simeons with Christian Louboutin shoes. Jamie is wearing a Levi’s trucker jacket.

25+ pictures inside of Lily Collins and Jamie Campbell Bower spreading the word on The Mortal Instruments: City of Bones…