right out of the graphic novel type of thing, where he was as much of a cartoon, in a way, as the monsters were. His ego was just as big and his problems were just as big. I really did do that consciously. I created a General Ross before which created a verisimilitude for the monsters, by making him a human monster. I worked really hard on the makeup and the exaggerated behavior and things like that and a controlled psychosis." Sam Elliott had expressed interest in reprising the role from the 2003 Hulk film. Tim Blake Nelson as Samuel Sterns: The cellular biologist who develops a possible antidote to Banner's condition. Towards the end of the film, Sterns is exposed to some substance that begins his transformation into Leader. Nelson is "signed on" to reprise the role. Ty Burrell as Leonard Samson: A psychiatrist who is in a relationship with Betty during Bruce's absence. Burrell had performed with Norton in the off Broadway play Burn This in 2003, and when Leterrier met him, he recognized Burrell as the "jerk" from the 2004 Dawn of the Dead remake, which was how Samson was characterized in the script before Norton rewrote it. Christina Cabot as Kathleen Sparr: A major who is Thaddeus Ross's personal aide. Robert Downey Jr. has an uncredited cameo as Tony Stark at the end of the film, reprising the role from the MCU film Iron Man (2008). Downey appeared as a favor to Marvel Studios, which he acknowledged as a smart move on Marvel's part, because when he was promoting his film he would also have to mention their other production. Hulk co-creator Stan Lee cameos as a man who becomes ill when drinking the soda poisoned by Banner's blood. Michael K. Williams appears as a Harlem bystander, a role that was written for him by Norton, who is a fan of The Wire. Paul Soles, who voiced Banner in the 1966 The Marvel Super Heroes animated series, appears as Stanley, a kindly pizza restaurant owner who helps Banner. Additionally, the late Bill Bixby appears, in a scene on his TV comedy-drama The Courtship of Eddie's Father on a television Banner is watching at the beginning of the film. Rickson Gracie has a small role as Bruce Banner's martial arts instructor; despite Gracie's Brazilian Jiu-Jitsu background, he is credited as an Aikido instructor. Brazilian actress Débora Nascimento