Bill Irwin was born on April 11, 1950, in Santa Monica, California, to Elizabeth (Mills), a teacher, and Horace G. Irwin, an aerospace engineer. He is the oldest of three children, and is of English, Irish, and German descent. Irwin spent a year in Belfast, Northern Ireland, as an exchange student. He is a graduate in theatre arts from Oberlin College, OH, a graduate of Ringling Brothers and Barnum & Bailey's Clown College, FL, and received a MacArthur Genius Grant in 1984.
