Ledger wins supporting actor award in US
Heath Ledger has won American critics' best supporting actor award for his role as The Joker in The Dark Knight .
The latest Batman film also won best action movie at this year's Critics' Choice Awards.
The crowd rose to its feet as the film's director, Christopher Nolan , accepted the award for Ledger.
"I can't presume to speak for him. His voice was as unique as it was original," said Nolan, adding that working with the actor "was one of the greatest experiences any of us ever had or will have".
"His contributions to cinema should be greatly appreciated," Nolan said, "so thanks for this appreciation."
Ledger, who died of an accidental drug overdose in January 2008, is red hot favourite to win a Golden Globe for best supporting actor on Monday, according to Las Vegas bookmakers.
Slumdog Millionaire won five prizes at the Critics' Choice Awards, including best picture and honours for director Danny Boyle, writer Simon Beaufoy, star Dev Patel and composer AR Rahman.
Sean Penn was another double winner, earning best actor honours and sharing the acting-ensemble prize for Milk .
Kate Winslet was named best supporting actress for The Reader, while Anne Hathaway and Meryl Streep tied for best actress for Rachel Getting Married and Doubt respectively.
The 14th annual Critics' Choice Awards, presented by the Broadcast Film Critics Association at the Santa Monica Civic Auditorium on Thursday, honoured cinematic excellence in 17 categories.
The group, which represents more than 200 TV, radio and online critics from the United States and Canada, founded the Critics' Choice Awards in 1995.