Milton "Gummo" Marx (October 23, 1892 – April 21, 1977) was an American vaudevillian performer, actor, comedian, and theatrical agent.

[5] Gummo, who in an interview said he never liked being on stage,[citation needed] left the group and joined the military during World War I.

[7] After that collaboration ended, Gummo represented his brother Groucho and worked on the television show The Life of Riley, which he helped develop.

[9] Gummo may have received his nickname because he had a tendency to sneak around backstage, creeping up on others like a "gumshoe" private detective.

Another explanation cited by biographers and family members is that Milton, the sickliest of the brothers, often wore rubber overshoes, also called "gumshoes", to protect himself in inclement weather.

Gummo and his wife Helen are interred next to each other in the Freedom Mausoleum at the Forest Lawn Memorial Park in Glendale, California.

[citation needed] Gummo's only biological child, Robert, served in the United States Coast Guard for two years and later worked as an architect.