15. Lily and co-star Jamie Campbell Bower
Speaking of The Mortal Instruments, the actress briefly dated her City of Bones co-star Jamie Campbell Bower between 2012 and 2013.
While fans were ogling about their onscreen chemistry, their relationship wasn’t exactly smooth sailing as the pair split up a few times in between.
Lily and Jamie finally broke up just before the movie was released. Nevertheless, the two professional actors did not let this get in the way as they still remained close throughout.