Nina Dobrev and Ian Somerhalder famously dated—and split—during the run of The Vampire Diaries. Now, their former co-star Claire Holt is praising them for how they handled their on-set Three years after their romance was made public news, the couple decided to split, but to make matters worse, they continued working together on Vampire Diaries — up until Dobrev decided to quit the show in 2015, leaving fans utterly stunned. Many believed that Dobrev struggled to work with the man she spent three years of her life with Nina Dobrev and Ian Somerhalder's relationship spanned three years, according to Who's Dated Who. The former couple fell in love while working together as part of The Vampire Diaries cast. Fans of the show couldn't help but love these two, who turned their friendship into one of the most talked about romances ever. mKDiE.