Ronson and Winehouse performed at the Brit awards this year
Amy Winehouse is working on a theme song for the forthcoming James Bond film with Mark Ronson, the producer has confirmed to the BBC.
But Ronson said there are no guarantees the track will be used for Quantum Of Solace as they have not been officially signed up to release the song.
"Hopefully it will get used. We're working on it and we'll see happens," the producer told BBC 6 Music.
Ronson also said he is working with Winehouse on her new album.
He said it was Winehouse who was first approached about the Bond theme tune.
"They asked Amy, and I think Amy said that if she did it, she'd want to do it with me. So hopefully something will come of it," he told the station's Music Week's show.
"The demo sounds like a James Bond theme, hopefully. But I don't know if it'll get used."
He added: "I'm sure there are loads more really famous people that probably we're competing with and we don't know about. I'm not sure.
"But hopefully I'll still be alive for at least 12 more Bond themes. If we don't get this one maybe we'll get another one."