Late actor Health Ledger's Joker in the new Batman movie The Dark Knight has been dubbed as 'best villain in a superhero movie of all time'.

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The critics have also started backing Ledger for a posthumous Oscar in their reviews of the actor's last completed film, The Dark Knight.

Los Angeles entertainment reporter Sam Rubin said on his KTLA-TV blog that Ledger's role as The Joker is 'amazing work', eports Daily Telegraph.

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He said that Ledger 'gives a blockbuster performance' and 'will absolutely be nominated for an Oscar, and at this point in the year, Ledger is also a hands-down favourite to win it posthumously'.

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Ledger, who died in January this year, will also receive a tribute at the end of the credits in the film. The film will release on July 18.

Text: ANI