Nina Dobrev and Ian Somerhalder, The Vampire Diaries’ showmance couple, have reportedly called it quits after three years of dating.

The castmates are determined to remain professional on set following their breakup, a source told US Weekly. “[Dobrev and Somerhalder] will continue to work together and remain best friends, which is where the relationship started."

Dobrev and Somerhalder, who play Elena Gilbert and Damon Salvatore, respectively, on the hit CW series, took their romance public back in 2011. Last fall, Dobrev opened up about the development of their romance. "I didn't want to be dating one of my costars — my goal on the show was to be professional," she told Seventeen magazine. "But sometimes you can't help who you have a connection with, and you can only fight it for so long — which I did for a really, really long time."

The Vampire Diaries, which is in it’s fourth season, has been renewed for a fifth. Dobrev will soon start filming the Fox movie Let’s Be Cops. Both she and Somerhalder have been rumored to be cast in the upcoming Fifty Shades of Grey film, but no official decisions have been made.

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