Adele is keeping James Bond bosses in the dark over whether she'll record the next theme song.

The global superstar recorded the title track for 2012 movie 'Skyfall', and while many behind the scenes of the upcoming 24th film in the British spy saga are keen for her to sing the next song, she's refusing to commit just yet.

An insider at studio MGM told The Sun on Sunday newspaper: ''The chiefs here have made their feelings known to Adele that they want her back for the next film.

''Daniel has also made it clear he loved Adele and wants her back but she has not responded, which is making them sweat.''

If Adele accepted the offer, she would become the first singer to record more than one Bond theme since Shirley Bassey, who performed 'Goldfinger', 'Diamonds Are Forever' and 'Moonraker'.

She could have competition though, with British rockers Biffy Clyro throwing their name in the hat and admitting they would ''love'' to write a track for one of 007's adventures.

Frontman Simon Neil recently said: ''Biffy for Bond, yes - I will follow you to the ends of the earth, sir. I'd love that.

''I think we've got a couple of songs in our back catalogue that could have suited but that is most songwriters' dream, isn't it, to write for Bond?

''You get given the key it has to be in, I believe, and certain motifs ... It's such a dramatic theme that I think it would really suit us.''