Born Gabriel Marcel Dell Vecchio in New York City, Dell almost made his stage debut a few years before Dead End when he and his sister were slated for roles in The Good Earth with Alla Nazimova and Claude Rains. Dell served in the United States Merchant Marine during World War II. He appeared in numerous films as a Dead End Kid/East Side Kid/Bowery Boy. In the 1944 East Side Kids film Million Dollar Kid, Dell actually appeared as a Criminal villain, pit against the boys, who gets brought to justice in the end.