Barry Keoghan (born 18 October 1992) is an Irish actor. He has appeared in the films Dunkirk; The Killing of a Sacred Deer, for which he won an Irish Film and Television Award for Best Supporting Actor and was nominated for the Independent Spirit Award for Best Supporting Male; and Calm with Horses, for which he was nominated for the BAFTA Award for Best Actor in a Supporting Role, and the RTÉ drama Love/Hate. He also played Druig in Eternals and the Joker in The Batman.
A sleepless office worker, fed up with his life, crosses paths with a peculiar salesman. Both create an underground fight club as a form of therapy and, little by little, the organization grows and its objectives take another direction.