잭(Heath Ledger) was an Australian actor known for his versatile performances in film. He gained international fame for his roles in movies such as 10 Things I Hate About You, Brokeback Mountain, and The Dark Knight. Ledger's portrayal of the Joker in the latter earned him a posthumous Academy Award for Best Supporting Actor. Born on April 4, 1979, in Perth, Australia, Ledger began acting in television before transitioning to film. He was recognized for his dedication to his craft and often immersed himself deeply into his characters. Tragically, he passed away on January 22, 2008, at the age of 28.