Heathcliff Andrew Ledger was born in 1979 in Perth, Western Australia, and left school early to pursue acting in Sydney before crossing to Hollywood in the late 1990s. Early roles in Ten Things I Hate About You and The Patriot showcased charm and intensity, but Ledger resisted typecasting, seeking directors who challenged him. Ang Lee's Brokeback Mountain (2005) paired him with Jake Gyllenhaal in a story of forbidden love that earned him an Academy Award nomination and demonstrated his willingness to inhabit roles that unsettled mainstream audiences.

Ledger prepared obsessively. For A Knight's Tale he learned jousting; for Brokeback he adopted Wyoming mannerisms; for his posthumously released turn as the Joker in The Dark Knight he locked himself in a hotel room for weeks, compiling a notebook of voices and gestures. The result was a chaotic, terrifying performance that won the Oscar for Best Supporting Actor after Ledger died in January 2008 from accidental prescription drug intoxication in New York.

Colleagues remembered Ledger as generous, playful, and consumed by craft rather than celebrity. His death prompted scrutiny of Hollywood workloads and prescription practices while cementing a brief filmography— including Lords of Dogtown, Candy, and I'm Not There— that directors and actors study as a model of risk-taking within blockbuster cinema.

1. 1999

   Ten Things I Hate About You

   Breakthrough teen comedy role that introduced him to American audiences.

2. 2005

   Brokeback Mountain

   Starred as Ennis Del Mar in Ang Lee's Wyoming romance.

3. 2007

   Dark Knight Filming

   Completed principal photography as the Joker under Christopher Nolan's direction.

4. 2008

   Death in New York

   Found dead in Manhattan at twenty-eight from acute prescription drug intoxication.

5. 2009

   Posthumous Oscar

   Won Best Supporting Actor for The Dark Knight after the film's release.