Actor Noel Clarke, who took home the rising star award, told the BBC as he arrived that he was backing Winslet all the way.
Referring to the comments some critics made about her acceptance speech at the Golden Globes in January, he said: "I think we should stop taking the mickey out of Kate Winslet and her acceptance speeches and get behind her more more."
Speaking before the ceremony Winslet told BBC News she was not "even going to talk about speeches" when asked about what she planned to say later if she won.
The star said she was keeping her fingers crossed about taking a trophy home with her.
"I've been doing this for a long time now and I really love what I do, I care very, very much, she said.
"My mum and dad are here with me tonight and I think they're secretly hoping I take home some hardware."
Former Monty Python star Terry Gilliam will receive a Bafta Fellowship in recognition of his contribution to film.
"I'm going to get very emotional and will probably need to be carried on stage in a blubbering heap," he said.
Gilliam's latest big screen adventure, The Imaginarium Of Doctor Parnassus, was actor Heath Ledger's final film.
Danny Boyle was grateful his father was able to watch TV at home
He said the film "turned out great" and he hopes it will be a "fitting memorial" to the late star.
Held two weeks before the Academy Awards in Los Angeles, the Baftas are one of the key events of the so-called film awards season.
All four of last year's Bafta-winning actors went on to receive the same awards on Oscar night.
Landing one of Bafta's golden masks, however, is not a cast-iron guarantee of further prizes.
Last year, Keira Knightley's Atonement was named best film at the Baftas only to be trumped at the Oscars by the Coen brothers' No Country for Old Men.
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