Actor James Mitchum is the oldest son of film star Robert Mitchum. A dead ringer for his dad, James has found the family resemblance both blessing and curse; it has opened many professional doors, but also made him the target of the slings and arrows of jaundiced critics. The first of Robert Mitchum's progeny to break into movies, Jim essayed a microscopic role in 1949's Colorado Territory.
His official screen debut was the perennial drive-in favorite Thunder Road, playing Papa Robert's younger brother!. Like his actual brother Christopher Mitchum, James has most often been cast in Westerns (Young Guns of Texas, The Tramplers et. al.). James Mitchum was at one time married to actress Wende Wagner. ~ Hal Erickson, All Movie Guide. 