Katerina Alexandra “Kat” Graham is an American actress, singer, songwriter, record producer, dancer and model. She has appeared in numerous television shows and film productions, as well as music videos. In 2009, she began appearing in a supporting role as Bonnie Bennett in The CW television network show, “The Vampire Diaries.”

Nina Dobrev is a Canadian actress. She played the role of Mia Jones, the single teenage mother, on Degrassi: The Next Generation, from the show’s 6th to 9th season. She currently stars as Elena Gilbert and Katherine Pierce on The CW television network show, “The Vampire Diaries.”

Source: Kat Graham and Nina Dobrev