Celebrity couple Ian Somerhalder and Nina Dobrev have split after three years together, according to a U.S. report.

The Vampire Diaries co-stars, who play Elena Gilbert and Damon Salvatore on the hit Tv series, have decided to end their relationship, report editors at UsMagazine.com.

The two actors went public with their romance in 2011 and have reportedly vowed to remain friends and not let the split affect their work on the supernatural drama.

A source tells the publication, "(They are) consummate professionals (and) will continue to work together and remain best friends, which is where the relationship started."