Brain Donors is a 1992 American comedy film directed by Dennis Dugan and released by Paramount Pictures, loosely based on the Marx Brothers comedies A Night at the Opera and A Day at the Races (the first two films the Marx Brothers made for Metro-Goldwyn-Mayer after leaving Paramount). The film co-stars John Turturro, Mel Smith, and Bob Nelson in the approximations of the Groucho, Chico, and Harpo roles, with Nancy Marchand in the Margaret Dumont dowager role. It was executive produced by David and Jerry Zucker, through their Zucker Brothers Productions.