Lang began his career in the film industry as an office worker in a film production company after the First World War in New York City. He quickly worked his way to assistant director before and turned in 1925 with The Red Kimona his first feature film. Up to and including 1961 was followed by more than 60 films.
His greatest successes came with lightweight musicals and comedies, but had more success at the box office, because. Among critics He was even once nominated as a director for the Oscar: The King and I in 1956 He also received a total of three nominations for the Directors Guild of America Award. .
1960 Long was honored for his work with a star on the Walk of Fame.