In fact, they were seen holding hands on Friday while leaving a photo call at Franklin Mills Mall in Philadelphia. "They've been really good about doing the press tour together for their movie," a source said. "They were able to stay friendly."
Collins previously dated her “Abduction” costar Taylor Lautner from November 2010 to September 2011; she also romanced Zac Efron for three months in 2012.
Campbell Bower was previously engaged to his “Harry Potter and the Deathly Hallows: Part 1” co-star Bonnie Wright. They quietly split in June 2012 after two years together.