Casting of the film was difficult. Jason Robards was originally cast in the title role, but he became ill with dysentery during early filming. After leaving for treatment, he was forbidden by his doctors to return. Herzog considered casting Jack Nicholson, or playing the role of Fitzcarraldo himself, before Klaus Kinski accepted the role. Herzog had done considerable film work with Kinski. By that point, forty percent of shooting with Robards was complete. For continuity, Herzog had to begin a total reshoot with Kinski. Mick Jagger as Fitzcarraldo's assistant Wilbur and Mario Adorf as the Ship's captain were originally cast, but due to the delays, their shooting schedule expired. Jagger parted to tour with the Rolling Stones. Herzog dropped Jagger's character from the script altogether as he reshot the film from the beginning. Brazilian actor Grande Otelo and singer Milton Nascimento play minor parts.