Sasha Pieterse is a South African-born American actress, singer, and songwriter. Pieterse gained fame as Amanda on the series Heroes and joined the cast of Pretty Little Liars in 2010, appearing for its seven-season run until 2017. She later appeared in the spin-off series Pretty Little Liars: The Perfectionists in 2019. Pieterse has also appeared in films such as The Adventures of Sharkboy and Lavagirl, X-Men: First Class, Geek Charming, and G.B.F. Her music contributions include the singles R.P.M., No, and I Can't Fix You.