As of 9:30 p.m. Sunday, Heath Leger had won a posthumous Academy Award for best supporting actor in “The Dark Knight,” Penelope Cruz had won a best supporting actress Oscar for her role in the Woody Allen comedy “Vicky Cristina Barcelona” and the robot adventure story ”WALL-E” had won the best animated feature Oscar. Ledger’s parents and sister accepted the Oscar on behalf of Ledger’s young daughter.