Colin Farrell had to undergo a complete transformation to play the role of Oz Cobb in HBO’s The Penguin. According to Farrell, that even included adding on a fake crotch. Speaking to People ahead of The Penguin’s premiere tonight,

When Colin Farrell looked in the mirror after donning prosthetic makeup for his role as the title character in the Max series “The Penguin,” he could no longer recognize himself.

"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."