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Leona Lewis has recorded the signature song for upcoming science fiction film, Avatar.

The 24-year-old X Factor winner performs the tune that will accompany the closing credits, called I See You.

Lewis could find herself with a global hit on her hands considering the anticipation around the film.

James Horner and Simon Franglen - the men behind Celine Dion's Titanic hit My Heart Will Go On - are also on board to produce the song.

The much-hyped Avatar, directed by James Cameron, is being billed as an epic adventure with new standards of special effects. The director first conceived the film 15 years ago but back then the technology didn't exist to make it happen.

Premiering in London in December, it tells the tale of an alien race defending their land against human invasion.

It features Aliens actress Sigourney Weaver, as well as Sam Worthington and Michelle Rodriguez from Lost.

Lewis meanwhile seems to be back on track after being badly shaken by her recent assault at a book signing.

The London born singer has just released Echo, the follow-up to her multi-million selling debut album, and also announced last week she's setting out on her first UK tour next summer.