Milton "Gummo" Marx was an American vaudeville performer, theatrical agent and businessman. He was the fourth-born of the five Marx Brothers. Born in Manhattan, he worked with his brothers on the vaudeville circuit, leaving the act when he was drafted into the U.S. Army in 1918 during World War I and replaced by his brother Zeppo. He had no desire for an acting career, never appeared in any of his brothers' films, and became a successful businessman.