Heath Ledger was posthumously given the Australian Film Institute’s international award for best actor for his performance as the Joker in The Dark Knight on Saturday. Ledger’s father Kim, mother Sally and sister Kate accepted the top Australian film industry award on his behalf. Kate said, “It’s been without a doubt the most difficult year, losing such a loved family member. We are so proud of him and humbly accept this award on behalf of his beautiful daughter [Matilda, with actress Michelle Williams], who we will cherish forever.” Sally Ledger also thanked the film institute, saying, “We are immensely proud of him, not only for his professional achievements, but in the way he truly cherished his family, friends and his precious Matilda. Heath was never one to accept mediocrity, he put his heart and soul into achieving what he believed was required and followed his passions with great enthusiasm and an insatiable curiosity.” Ledger died at the age of 28 of an accidental prescription drug overdose in New York earlier this year.