"I was basically covered wrist to ankle," the actor tells PEOPLE of his transformation in 'The Penguin.' "The only things that were me were my hands and feet."

Matt Reeves didn’t start out wanting Colin Farrell to disappear behind a pile of prosthetics. When his discussions with the actor began before the making of 2022’s The Batman, the primary focus was on the inspiration for Oz Cobb,

The cast and crew of the new HBO series talk in great detail about how Colin Farrell transformed on-screen, physically and artistically, into becoming Oswald "Oz" Cobbs.