Versatile actor he starred in Dreamscape, The Right Stuff and Breaking Away.
He gained the nickname Dennis Quand in high school due to his intense love for everything James Bond-related.
He was formerly married to actress Meg Ryan, whom he worked with in the 1987 film Innerspace.
He got married to actress, Meg Ryan, in February 1991, and the relationship ended in July 2001. His brother is actor, Randy Quaid.
He was nominated for Best Supporting Actor in The Last Detail starring Jack Nicholson.