Popsugar Celebrity Celebrity Couples Celebrities Who Have Dated Their Costars 18 Actors Who Couldn't Seem to Stop Dating Their Costars June 2, 2018 by Britt Stephens View On One Page Photo 50 of 50 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 50 Ian's most famous relationship was with his Vampire Diaries costar Nina Dobrev. They were together from 2010 to 2013. Previous Next Start Slideshow Celebrity CouplesCelebrity FactsCelebrity Breakups