Heath Ledger, 28 Years Old
The Australian actor, whose final role before his death was the legendary Joker from "The Dark Knight," died at the age of 28 due to a drug overdose in Manhattan. Known for films such as "10 Things I Hate About You" and "Brokeback Mountain," the actor was married to Michelle Williams and the couple shared a child, Matilda, at the time of his death. "The Dark Knight" was in the editing phases when he passed, and he never got to see the final product.