Blanchard's career was launched with a part in a McDonald's commercial, and as an eight-year-old on the Canadian children's show The Kids of Degrassi Street, in which she played Melanie Schlegel. She also starred in the television series War of the Worlds as Suzanne McCullough's daughter Debi and in YTV's Are You Afraid of the Dark? as Kristen. Blanchard played the part of Cher Horowitz (originally portrayed by Alicia Silverstone in the film version) on the television series Clueless (based on the 1995 movie of the same name). She also played Roxanne on the television series 7th Heaven from 2002 to 2004.
