Billy Murphy

Billy Murphy is the machete-wielding mass murderer and the main antagonist of the 2014 slasher comedy movie The Final Girls. He serves as the main villain of 2 fictitious 1980s slasher films titled "Camp Bloodbath" and "Camp Bloodbath 2: Cruel Summer".

He is portrayed by Dan B. Norris, and his younger self (credited as "Young Billy") was played by Eric Michael Carney.