Sasha Pieterse is a South-African born American actress. On House, M.D., she portrayed 9-year-old cancer patient Andie in the Season 2 episode Autopsy.
Pieterse started her acting career at the age of 6 in the reboot of the classic series Family Affair. She then obtained a featured role in Robert Rodriguez's The Adventures of Shark Boy and Lava Girl. She also appeared on two series of Heroes as Amanda Strazulla.