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Sasha Pieterse is a South-African born American actress, currently starring as the character Alison DiLaurentis on Pretty Little Liars. 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 re-boot of the classic series Family Affair. She then obtained a featured role in Robert Rodriguez's The Adventures of Shark Boy and Lava Girl, alongside a very young Taylor Lautner. She also appeared on two series of Heroes as Amanda Strazulla.

Look for Pieterse in this summer's X-Men First Class as the object of Banshee's affection.

Sasha Pieterse at IMDB

Sasha Pieterse at Wikipedia