Giovanni Ribisi was born in Los Angeles, California. His father, Albert Anthony Ribisi, is a musician who had been the keyboard player in People!, and his mother, Gay (née Landrum), is a manager of actors and writers. He is the twin brother of actress Marissa Ribisi and the brother of voice actress Gina Ribisi. He is of Italian, English and German descent. Ribisi began acting on television during the 1980s and on films during the 1990s. For My Name Is Earl, he was nominated for the Primetime Emmy Award for Outstanding Guest Actor in a Comedy Series. Ribisi starred in James Cameron's acclaimed highest-grossing film Avatar. In 2016, Ribisi directed a music video for "Siberian Nights", the third single from Ash & Ice by The Kills. Ribisi played Marius in the Amazon series Sneaky Pete. The pilot was created and produced by David Shore and Bryan Cranston, who also starred in the series. It was added to Amazon in 2015 and was picked up for ten of each episodes in 2016. The series premiered on January 13, 2017. Ribisi married actress Mariah O'Brien in 1997 and together they have one daughter, Lucia. The couple divorced in 2001. In 2007, he began a relationship with indie rock singer-songwriter Cat Power. The couple lived together for five years before ending their relationship in 2012. Ribisi married English model Agyness Deyn on June 16, 2012, and filed for divorce in January 2015. Ribisi is an active Scientologist. He participated in the gala opening of Scientology's Psychiatry: An Industry of Death museum in December 2005. His twin sister, Marissa, is also a Scientologist. She is married to musician Beck, another Scientologist.

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