Laura Dianne Vandervoort (born September 22, 1984) is a Canadian actress known for her roles as Kara Zor-El (Supergirl) in the television series Smallville, Sadie Harrison in the television series Instant Star, and Lisa in the television series V. Description above from the Wikipedia article Laura Vandervoort, licensed under CC-BY-SA, full list of contributors on Wikipedia. ​