Nikolina Konstantinova Dobreva (born January 9, 1989), better known as Nina Dobrev, is a Canadian actress. Her first acting role was of Mia Jones in the drama series Degrassi: The Next Generation. She later became known for portraying Elena Gilbert and Katherine Pierce on The CW's supernatural drama series The Vampire Diaries.

Born in Sofia and raised in Toronto, Dobrev made her screen debut playing minor roles in various films. Following her television success, she appeared in a variety of films, including the 2012 coming-of-age drama The Perks of Being a Wallflower, the comedies Let's Be Cops and The Final Girls (2014), and the 2017 science-fiction drama Flatliners. Her biggest commercial success came with XXX: Return of Xander Cage (2017). She also starred in the romantic comedies Dog Days (2018), Then Came You (2018), and Love Hard (2021), and had a leading role in the sitcom Fam (2019).