William Abadie is an actor and producer born in Saint-Raphaël, on the Côte d'Azur in France.

He spent his childhood and adolescence in Megève in the French Alps. After many trips abroad, he settled in Paris where he studied at the Ecole Claude Mathieu. In 1998, he left Paris for New York. He became a student of The Lee Strasberg Theater Institute where he won an award of excellence. It was at this time that he became a permanent member of the Actors Studio. He created his first play in New York in 2000 entitled Italian - American Reconciliation which he produced and in which he acted. A few months later, still as a producer and actor, he staged Off-Broadway Dennis McIntyre Modigliani's play. Her first film appearance dates back to 2002, in Adrian Lyne's film Infidèle, a remake of Claude Chabrol's La Femme infidèle. He recently filmed Homeland Season 3 for Showtime in Charlotte, North Carolina.