Amanda Seyfried is an American actress and singer known for her versatility in film and television. Born on December 3, 1985, in Allentown, Pennsylvania, she first gained attention for her role in Mean Girls (2004) and the TV series Veronica Mars (2004-2006). Seyfried's breakout role came with the musical Mamma Mia! (2008), where she showcased her singing abilities, followed by critically acclaimed performances in Les Misérables (2012) and Mank (2020), the latter earning her an Academy Award nomination.