Richard Treat Williams (born December 1, 1951) is an American actor and children's book author who has appeared on film, stage and television. He first became well known for his starring role in the 1979 film Hair, and later also starred in the films Prince of the City, Once Upon a Time in America, The Late Shift and 127 Hours. From 2002 to 2006, he was the lead of the television series Everwood and was nominated for two Screen Actors Guild Awards. Williams was born in Rowayton, Connecticut, the son of Marian (née Andrew), an antiques dealer, and Richard Norman Williams, a corporate executive. His maternal great-great-great-grandfather was Senator William Henry Barnum of Connecticut, a third cousin of the showman P. T. Barnum. Williams is a distant relative of Robert Treat Paine, who was a signatory to the Declaration of Independence. Williams played football in high school. He graduated from the Kent School in Connecticut and Franklin and Marshall College in Pennsylvania. Williams resides in Park City, Utah and Manchester Center, Vermont with his wife, Pam Van Sant, and two children, Gill and Ellie.

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