Ross Hagen was an American voice actor, actor, director, screenwriter and producer whose television acting credits included Daktari. His film credits included The Hellcats in 1967 and The Sidehackers in 1969. His video game credits included Red Dead Redemption and Undead Nightmare.
Hagen was born Leland Lando Lilly in Williams, Arizona. However, he was raised on an Oregon farm. Hagen and his first wife had two children, Bob Lilly and Julie Lilly-Beloit. He was married to his second wife, Claire Polan, an actress from 1963 until her death in 2003. Outside of acting, Hagen also served in the United States Army.
Hagen began his acting career during the 1960s. His early career included guest appearances on The Virginian and The Big Valley. He was cast in the CBS television series Daktari, in 1968. He portrayed a safari photographer named Bart Jason until the end of the show in 1969. Hagen's other film credits included The Mini-Skirt Mob and Speedway in 1968, The Devil's 8, The Organization, Angels' Wild Women, Melinda, Wonder Women, Night Creature, Angel, Avenging Angel and Armed Response.