Although he developed a robust career as a leading man and character actor for decades, the late James Caanwill always be Sonny, the eldest, hot-headed brother of the Corleone family in The Godfather. It’s the kind of role that cements an actor’s legacy for life. Caan dined out on The Godfather for years, and his performances in future filmsall evoke traces of Sonny and his flaring temper and hard edge. In the early ’70s, when Francis Ford Coppola adapted this popular bestseller into the apex of the cinematic medium, Caan seemed like he was born to play this meaty role. However, Marlon Brandowasn’t the only star of the film to undergo extensive makeup and prosthetics to transform into a character. While not as pronounced, Sonny’s appearance, centered around his indelible grimace, was the result of dental implants.