Mieczyslaw "Mickey Doyle" Kuzik is a fictional character in the HBO TV series Boardwalk Empire. He is played by Paul Sparks. Mickey Doyle is loosely based on Polish American mobster Mickey Duffy. Mickey is a gangster in Prohibition-era Atlantic City. For the first two seasons, he is the main rival of harlem liquor kingpin Chalky White. He is known for his distinctive, nasal laugh, and serves as the series' comic relief.