The godfather According to Mario Puzo, the character of Johnny Fontane was NOT based on Frank Sinatra. However, it was widely assumed that it was, and Sinatra was furious; when he met Puzo at a restaurant, he screamed vulgar terms and threats at Puzo. Sinatra was also vehemently opposed to the film. Due to this backlash, Fontane's role in the film was scaled down to a couple of scenes. Radio personality Howard Stern has said that he would gladly have any cast member of this film as his guest, and they can show up at his studio unannounced. Though over the years, cast members such as Robert Duvall and James Caan were pre-scheduled guests, his "just show up" policy was never taken up until Gianni Russo arrived one day. Stern immediately had him escorted into his studio, even though he was in the midst of other guests at the time, and interviewed him. James Caan and Al Pacino were only ten years younger than Morgana King, who plays their mother.John Cazale was only five years younger Tommy Lee Jones was considered for the role of Michael Corleone.