Johnny Fontane is a fictional character from Mario Puzo's novel, "The Godfather," published in 1969. He is portrayed as a popular singer and actor, known for his charm and talent. Fontane is the godson of Vito Corleone, the head of a powerful crime family, which plays a significant role in his career and personal life. In the story, Fontane struggles with the pressures of fame and the influence of the Corleone family. His character represents the intersection of show business and organized crime, highlighting the complexities of loyalty and ambition in a world dominated by power and connections.