Nat Perrin (March 15, 1905 – May 9, 1998) was an American comedy film, television and radio screenwriter, producer and director who contributed gags and storylines to several Marx Brothers films and co-wrote the script for the film Hellzapoppin' (1941) adapted from the stage musical. He is credited with writing the screenplay or story outline for over 25 films, including The Big Store (1941), The Great Morgan (1945), and Song of the Thin Man (1947), as well as several television series.