Oliver Platt was born in Windsor, Ontario, to American parents, Sheila Maynard, a social worker, and Nicholas Platt, a career diplomat. His parents were both from upper-class families, and his maternal great-grandmother, Cynthia Roche, was the sister of Princess Diana's maternal grandfather, Maurice Roche.

Platt spent his childhood in Washington, D.C., Asia, and the Middle East. Oliver graduated with a Bachelor of Arts degree with a major in Drama in 1983 from Tufts University. He then trained at Shakespeare & Co. with Kristin Linklater.

Oliver Platt at an event for Casanova (2005)

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James Woods, Louis Gossett Jr., and Oliver Platt in Diggstown (1992)

Oliver Platt and Mitchell Haaseth in Modern Family (2009)

Robin Williams, Oliver Platt, and Kiersten Warren in Bicentennial Man (1999)

Warren Beatty, Oliver Platt, and Joshua Malina in Bulworth (1998)

Oliver Platt and Joshua Malina in Bulworth (1998)

Charlie Sheen, Tim Curry, Rebecca De Mornay, Chris O'Donnell, Kiefer Sutherland, and Oliver Platt in The Three Musketeers (1993)

Robin Williams in Bicentennial Man (1999)

Oliver Platt

Oliver Platt

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