Cooper Joseph Koch is an American actor. He is best known for his portrayal of Erik Menendez in the biographical crime drama series Monsters: The Lyle and Erik Menendez Story (2024), which earned him nominations for a Primetime Emmy Award and a Golden Globe Award. He previously starred in the slasher film They/Them and the body horror film Swallowed, and is set to appear in Luca Guadagnino's upcoming biographical comedy drama film Artificial.