Leona Lewis records Avatar theme tune

Leona Lewis has recorded the theme for Titanic director James Cameron's eagerly anticipated new sci-fi film Avatar.

Chart-topping X Factor winner Lewis sings the track I See You during the closing credits of Cameron's upcoming movie, which is expected to set new standards in big screen special effects.

A message on 24-year-old Lewis's website confirmed: "We are proud to announce that Leona will record the signature song to the upcoming science fiction film, Avatar."

James Horner and Simon Franglen, who were behind Celine Dion's massive hit My Heart Will Go On from 1997's Titanic, have produced the new track.

The song will feature on the film's soundtrack, Avatar: Music From The Motion Picture, in December.

Avatar, which stars Sigourney Weaver and Sam Worthington, is about an alien race defending their land against human invasion and will also be released next month.

It was announced last week that Lewis, 24, has lent her famous voice to the soundtrack of one of the world's best-selling video game franchises.

The song My Hands, taken from the singer's second album Echo, will feature on Final Fantasy XIII, the latest chapter in the role-playing saga.