Olesya Rulin is a Russian-American actress, best known for her supporting role of Kelsey Nelson in the three parts of Disney's commercially successful ‘High School Musical’ franchise. She has also been a part of many other Disney Channel Original Movies, such as ‘Hounded, ‘The Poof Point’ and ‘Halloweentown High’. Her other film credits include direct-to-video movies like ‘Urban Legends: Bloody Mary’, ‘Vampire Chicks with Chainsaws’ and ‘Flying By’, and feature films like ‘Mobsters and Mormons’, ‘American Pastime’, ‘Forever Strong’, ‘Private Valentine: Blonde & Dangerous’ and ‘Expecting Mary’. In 2011, she played the lead in the psychological drama film ‘Apart’. She also appeared as the main character in the 2013 independent comedy film ‘Family Weekend’. Since her first appearance on television in Disney Original Movies, she has made guest appearances on a number of television series, including ‘Touched by an Angel’, ‘Everwood’, ‘CSI: Miami’, ‘The Mentalist’, ‘Drop Dead Diva’, ‘Touch’, ‘Dirty Work’ and ‘The Night Shift’. In the ABC series, ‘Greek’, she had a recurring role in 10 episodes, and also appeared on two episodes of the MTV comedy drama series, ‘Underemployed’. In 2015, she started playing one of the lead characters, Calista Secor, in the PlayStation Network series ‘Powers’.