Richard Mulligan was an American television and film actor.
He was born in New York City, the younger brother of director Robert Mulligan. After attending Columbia University, Mulligan began working in theatre, making his debut as a stage manager and performer on Broadway in All the Way Home in 1960. Additional theatre credits included A Thousand Clowns, Never Too Late, Hogan's Goat, and Thieves.
Mulligan starred with Mariette Hartley in the 1966-67 season comedy series The Hero, in which he played TV star Sam Garret, who in turn starred on a fictional series as Jed Clayton, U.S. Marshal. The Hero lasted only 16 episodes. Another notable TV appearance was on the I Dream of Jeannie episode "Around the World in 80 Blinks", as a navy commander accompanying Maj. Nelson on a mission.
Mulligan's most notable film role was as General Custer in Little Big Man, whom he portrayed as a borderline psychotic. Other film roles included the disaster movie spoof The Big Bus and he appeared in the movie Teachers as a mental patient mistaken for a substitute teacher whose pupils learn more from than the actual teachers.