Gregory Sestero (born July 15, 1978) is an American actor, model, producer and author. He is best known for his role as Mark in the 2003 cult film The Room and for his award-winning 2013 memoir The Disaster Artist about his life and experience making The Room.Sestero was born in Walnut Creek, California to a mother of French and Sicilian descent, and an American father. He was raised in Danville, California, where he attended Monte Vista High School.At the age of 12, he wrote a sequel to the then-recently released 1990 film Home Alone with a leading role for himself. He submitted the screenplay to Hughes Productions and received a commendatory letter from filmmaker John Hughes. Wikipedia
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