Won the Academy Award for Best Supporting Actor for his role as Conrad Jarrett in the 1980 film Ordinary People, becoming the youngest actor to win the award at the age of 20. He starred as Archie Goodwin on the A&E series A Nero Wolfe Mystery and as Nate Ford on the TNT series Leverage. He also starred in Netflix's horror film The Haunting of Hill House in 2018.
He discovered a love for acting after performing in his high school's production of Guys and Dolls.
In 1972, at the age of 12, he made an appearance in an episode of The Wonderful World of Disney.
He was married to his first wife, actress Debra Winger, from 1986 to 1990. His second wife was Aurore Giscard d'Estaing, the niece of former French president Valery Giscard d'Estaing. He has two sons named Milo and Noah.