James Cullen Landis was the middle of three siblings (two sons and a daughter) raised by Lulan and Margaret (née Cullen) Landis in
Nashville, Tennessee, where his father supported his family as a stockbroker. As a boy, James was a train enthusiast and dreamed of being a railroad engineer. Though the ambition eventually faded, his interest in railroads did not, and some years later he helped design for himself a model train set powered by steam. in ''It's a Great Life'' (1920) Cullen began working in the fledgling film industry at age 18 around the time his older sister,
Margaret Landis, appeared in her first film. Landis began as a movie director, only turning to acting after his lead player broke a leg and it was discovered that the actor’s costumes fit him. In 1928 Cullen Landis starred in the first 'all talking' motion picture,
Lights of New York. He confided in a friend that talkies were perfect for musicals and that he was no "song and dance man". He left Hollywood for Detroit in 1930 to produce and direct industrial films for automobile companies. In 1937 he joined the directorial staff of the
Jam Handy Picture Service, where he finished his professional career. ==World War II==