Geri Halliwell is set to marry her partner Christian Horner today, with her Spice Girls band-mates' children to walk her down the aisle.

The 42-year-old singer will wed Red Bull Formula One boss Horner at the Woburn Estate in Bedfordshire, England today and a source told The Sun that fellow Spice Girls Emma Bunton and Mel B's children will give her away.

According to reports, Halliwell's daughter Bluebell, Bunton's sons Beau and Tate, and Mel B's daughter Madison will walk down the aisle with the singer.

The source said, "The Spice Girls were an important part of her life and she's over the moon that Mel and Emma's children can play a part."

Victoria Beckham and Mel C will not be in attendance as they are out of the country.