Sarah Michelle Prinze (born April 14, 1977), known professionally by her birth name of Sarah Michelle Gellar ( /ˈɡɛlər/), is an American film and television actress. She became widely known for her role as Buffy Summers on the WB/UPN television series Buffy the Vampire Slayer, for which she won six Teen Choice Awards and the Saturn Award for Best Genre TV Actress and received a Golden Globe Award nomination. She originated the role of Kendall Hart on the ABC daytime soap opera All My Children, winning the 1995 Daytime Emmy Award for Outstanding Younger Actress in a Drama Series.
Her film work includes starring roles in I Know What You Did Last Summer (1997), Cruel Intentions (1999); Scooby-Doo (2002); The American remake of Japanese horror film,The Grudge (2004); and The Return (2006). Gellar also played an ex-porn star in Richard Kelly's Southland Tales (2007) and was part of an ensemble cast in The Air I Breathe (2008). Gellar also starred in Veronika Decides to Die (2009). She stars as twin characters Bridget/Siobhan on CW show, Ringer which premiered tuesday september 13th (2011) on the CW network.