Heath Ledger's accidental passing away marks one year on Thursday. As a reminder of the talent lost, he received an Oscar nomination for best supporting actor for his performance as the deranged Joker in The Dark Knight.

Ledger, who died at age 28, became the seventh actor to earn a posthumous nomination in the history of the Academy of Motion Picture Arts & Sciences.

The Australian actor will be up against Josh Brolin for Milk, Robert Downey Jr for Tropic Thunder, Philip Seymour Hoffman for Doubt and Michael Shannon for Revolutionary Road.

If he wins the statuette at the 81st annual Academy Awards on Feb. 22, he will enter even more select company, for only one performer, Peter Finch, nominated for 1976's Network, has ever won an Oscar after his death.

Ledger won a Golden Globe earlier this month.

Three years ago, Ledger was nominated as best actor for his work as a lovelorn cowboy in Brokeback Mountain, but it was Philip Seymour Hoffman's work in Capote that took home the prize.

The Academy Awards will air Feb. 22 on ABC from Los Angeles' Kodak Theater.

Click here for full list of Oscar nominations for 2009.