Like Spike Milligan, Feldman started his show-business career as a trumpet player, but soon turned to comedy. He formed a flourishing writing partnership with Barry Took in 1954. For British TV they wrote sit-coms The Army Game, Bootsie and Snudge, and most notably the ground-breaking BBC radio show Round the Horne, which starred Kenneth Horne and Kenneth Williams. and also benefitted from future Pythonites Michael Palin and Terry Jones co-writing with Barry Took. Feldman had a memorable series of his own shows on British commercial television (ITV) called Marty. His performances on American TV included the Dean Martin Show and Marty Feldman's Comedy Machine.
He is remembered for his role as the hunchback Igor in Young Frankenstein in which, as usual, many of his lines were improvised.
In a memorable sketch for "At Last the 1948 Show" (1/3/1967), (a series which featured Feldman's first screen performances) Feldman harassed a patient shop assistant John Cleese for the (sadly) fictitious book Ethel the Aardvark goes Quantity Surveying. The sketch was revived as part of the Monty Python stage show repertoire.
Feldman appeared in The Adventure of Sherlock Holmes's Smarter Brother and Silent Movie, also Mel Brooks films. He directed and starred in The Last Remake of Beau Geste and died from a heart attack in Mexico filming his last performance in the film Yellowbeard.
Brother of actress Fenella Fielding.