Heath Ledger"s tragic death cut short a career that seemed headed for the very highest level of stardom. Ledger"s easygoing charisma and powerful, understated acting formed a unique combination that seemed destined to shine for many years to come. His groundbreaking performance in "Brokeback Mountain" led to roles as diverse as the title role in "Casanova", Bob Dylan in "I"m Not There", the Joker in "The Dark Knight", and one of the four "Tonys" in "The Imaginarium of Doctor Parnassus". More great performances would doubtless have followed, were it not for the actor"s tragic death in January 2008.