Jamie Campbell Bower and Lily Collins couldn't hide their feelings for each other as they promoted their movie, The Mortal Instruments: City Of Bones.
The pair met on the thriller last year and have been inseparable ever since. They were spotted holding hands as they left Franklin Mills Mall in Philadelphia and happily posed for the cameras at the photocall.
Jamie and Lily, who play Jace Wayland and Clary Fray respectively in the popular series, were joined by the book's author Cassandra Clare during a Q&A session in the American city.
Lily Collins is GLAMOUR's cover girl this month and you can read the full interview with her in the September issue, out on Thursday.
GLAMOUR recently caught up with Jamie and Cassandra as they promoted the film.
When Jamie was asked which was this favourite scene with his real-life girlfriend, he revealed it was "The greenhouse scene".
Cassandra, meanwhile, said that Jamie was a perfect fit for the role of Jace. "Jace goes through lots of emotional changes & Jamie could do that."
Read the full Twitter Interview with Jamie and Cassie before.
The City of Bones is set to be released on 21 August in the UK.
