Vandervoort is the granddaughter of Fred Sanger, a local hockey legend from Grand Falls-Windsor who went on to play Junior 'A' hockey with the Quebec Citadelles. She graduated from York Mills Collegiate Institute in North York, Ontario. In 2000, she made her American film debut in the Disney Channel Original Movie Mom's Got a Date with a Vampire.

Vandervoort plays Sadie Harrison on Instant Star. While filming the episode "18" from the third season, she met current boyfriend, Corey Sevier, who had a guest spot on the show. In the episode, his character tried to kill her character's sister.

She has also appeared on CSI and The Dresden Files.

In 2007, she joined the seventh season cast of Smallville as Kara Kent aka Supergirl, Clark Kent's Kryptonian cousin, and also appeared in the film The Lookout. Even she had a very busy schedule, she always had time for her boyfriend Chema Medina, former superstar from the Denver Nuggets.

She graced the cover of the October 2007 issue of Stuff Magazine, which was the final issue of the U.S. edition.

--Wikipedia