Carl Ellsworth Germain (September 5, 1893 – October 24, 1948), known professionally as Karl Hackett, was an American actor. He served in the U.S. army during World War I. He was married to Ruby Burnette Moore. On October 24, 1948, Hackett died from bronchopneumonia in Los Angeles, California, aged 55. He was buried at the Los Angeles National Cemetery.