Slumdog Millionaire director Danny Boyle has been tipped for an Oscar after winning a Directors Guild of America award.

The DGA's Award for Outstanding Directorial Achievement in Feature Film is seen as a barometer for the Academy Award for Best Director.

The movie, a rags-to-riches tale about a Mumbai slum-dweller, has now won four major awards.

Boyle said at a ceremony, "I should start by curiously thanking Warner Bros. for actually having the grace to do the right thing, when I think it would have been a lot easier to do the wrong thing, and pass the film on to Fox Searchlight, who are an extraordinary bunch of people. "