It Was Fake
During the filming of the movie, an on-set photographer captured a shot of a man they claimed to be Daniel-Day Lewis. Even though the photographs did not appear to be of the actor, the photographer felt he had changed his appearance. The image quickly made its way to the press, where it featured in a number of magazines and websites, fueling conjecture that Day-Lewis had altered his appearance for the leading role. The actor photographed was Vince Froio, who played one of Daniel Plainview’s buddies near the end of the film.
He Was Deaf In Real Life
One of the most iconic scenes in the film is when a young H.W. Plainview loses his hearing due to a gas leak. We see H.W. Plainview as an adult, played by Russell Harvard, who is deaf in real life because the film is set over a long period of time. They chose to hire a deaf actor because the authentic portrayal of deaf people and others with disabilities has become more common in the film industry.