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John studied with William Esper and Deborah Van Valkenburgh.
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He is Irish-American.
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John shares his birthday with many celebrities such as Sarah Michelle Gellar and Adrien Brody.
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John's son, Jake attends the University of Miami studying business.
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Two of John's siblings are chiropractors.
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He is a former assistant director at Chelsea Westside Theater and a former teacher at Pratt Institute.
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John has an Abyssinian cat named Pharaoh.
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He enjoys practicing yoga and tai chi on a regular basis. When he's not busy, he spends time with his family.
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He was a football and track athlete in school.
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On stage he received a Drama Desk award for American Days, an Obie award for The Dining Room, and a Theatre World Award Yentl.
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He was first discovered after his portrayal of Joseph in The Nativity (1978).
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He is a regular reader on Selected Shorts which is broadcast nationwide on Public Radio International.
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John is a founding member of the Nantucket Film Festival.
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John has two sons named Jake and Caiden. He also has a daughter, Miranda.
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In 1988, John won an Emmy for Outstanding Supporting Actor in a Miniseries or a Special for Baby M. In 1998, John won an American Independent Award for Southie.
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He was married to Laura Pettibone for 30 years.
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As of 2001, John is married to Melissa MacLeod.
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He is 6'0½" tall.