Karger was married to Ann Conley of the "Ann & Effie Conley Sisters" Vaudeville Act. He was one of the original founders and the general manager of Metro Pictures in New York before they moved to Hollywood and merged with 塞缪尔·戈尔德温 and Louis B. Mayer to form MGM Pictures. His son Fred Karger was a composer and a vocal coach at Columbia Pictures. Romantically involved with a young 玛丽莲·梦露 from 1948-1949, Fred broke with Monroe, and eventually married 简·怀曼 in 1952.
Died on a train between New York and Fort Wayne, Indiana, USA.
Son of Hulda (Hirshberg) and Maurice/Morris Karger. His parents were German Jewish immigrants.