Taylor Kinney, the "Vampire Diaries" star is now playing real-life boyfriend to Lady Gaga, just shortly after playing her pretend boyfriend in the video for "You & I". A source said "It was just casual at first, but things are getting pretty hot and heavy. They are obviously totally into each other!" Well Taylor, you just went from being That Unknown Guy from the Vampire Diaries to Lady Gaga's Boyfriend.