They'll be hoping that Victoria Beckham will join them, in spite of her refusal to join them on their most recent reunion tour.
A source told The Sun they'd been talking about how to celebrate the film's anniversary and "are actively considering making a tongue-in-cheek sequel".
"They have approached a screenwriter who is considering working on the project and making tentative steps forward.
"It is still in the early stages but they are talking to established names in the business, which proves they are taking a big screen comeback seriously."
The 1997 film shows the band in the lead-up to a huge performance at the Royal Albert Hall, with cameos from Meat Loaf, Sir Elton John, Richard E Grant and other stars.
It received poor reviews but fans loved it, with the film raking in more than £70 million ($135m).
The band's last reunion was in 2019, when they performed 13 shows in a sell-out stadium tour throughout the UK and Ireland.
Bang! Showbiz reported that Melanie C earned £2.8m ($5.5m) for the Spice Girls reunion.
The 46-year-old pop star raked in an eye-watering amount of cash thanks to the Spice World tour and her own solo shows, according to The Sun newspaper's Bizarre column, which cited new accounts for her touring company, Red Girl Media Ltd.
