Greg Sestero was born and raised in the San Francisco Bay Area. With European parental influence, Greg speaks both French and English. He traveled extensively early on, and holds dual citizenship between France and the United States. At 17 years old, Greg signed with a prominent San Francisco talent agency. The same year, he left for Milan and Paris to work for designers such as Giorgio Armani and Gian Franco Ferre. Greg returned focused on acting. He began studies at the American Conservatory Theatre in San Francisco. He landed his first role at age 18, on the CBS hit show _"Nash Bridges" .
Attended Monte Vista High School in Danville, California from 1992-1995 before leaving to Milan, Italy to model at age seventeen.
Studied acting at American Conservatory Theatre in San Francisco, California.
Graduated from Venture HS 1996 in San Ramon, California, which runs an independent study program for actors/models, and holds a small group of graduates including the native supermodel Christy Turlington, also from Walnut Creek.