Bob Dylan has given his blessing to a movie about his life for the first time ever.The legendary singer-songwriter has given his seal of approval to biopic 'I'm Not There' which sees seven actors - including Christian Bale, Cate Blanchett, Richard Gere and Heath Ledger - playing Dylan at different stages in his life.Director Todd Haynes revealed at the film's premiere at the Venice Film Festival yesterday (04.09.07): "I do think it was because of this open structure, something that we keep expanding through the years."And because of that Bob thought, 'OK, this may be the one thing I'll say OK to.'"The 'Velvet Goldmine' director also revealed Oscar-winning actress Blanchett was terrified of playing Dylan in his folk-rock era.Haynes said: "Cate was scared. She told me many times this was a very scary challenge for her."I told her, 'You can't be totally terrified every time you do a new role, but it's good to be terrified sometimes. You're taking risks, you're putting yourself on a potential arrow, that when you really discover new things, and you rejuvenate.'

"And that's probably why she decided to give it a shot."

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