Lily Collins and Jamie Campbell Bower began dating in July 2012, a couple of months after he split from fellow Harry Potter actress and his fiancee of one year, Bonnie Wright.
The couple made their red carpet debut on November 27 at the British Fashion Awards after being photographed together multiple times over the summer while working on their upcoming movie The Mortal Instruments: City of Bones.
They split in the summer of 2013, in the middle of their movie's press tour. Reportedly, they have shown no signs of ill towards each other, and "have been really good about doing the press tour together for the movie. They were able to stay friendly. They remain very good friends."
Got back together in April 2015.