The Vampire Diaries costars end their romance after several years together

Love bites.

Vampire Diaries costars Ian Somerhalder and Nina Dobrev have called it quits after dating for several years, PEOPLE has confirmed.

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The couple were last seen taking a late-night trip to a cat hospital together last month, with no sign then that their own relationship may have been hurting.

Somerhalder, 34, and Dobrev, 24, kept their romance secret during their early days as a couple, despite evidence that they were together.