Tina Barrett, Paul Cattermole, Jon Lee, Bradley McIntosh, Jo O'Meara, Hannah Spearritt and Rachel Stevens will be bringing it all back for BBC Children In Need next month.
The pop group will reunite to perform a medley of their greatest hits live on the Children in Need Appeal show on Friday 14 November.
S Club 7 said: "We're massive fans of BBC Children in Need and it was great to be able to support the charity all those years ago.
"We're really looking forward to bringing it all back for Pudsey, for BBC Children In Need and for all our fans who have been so great over the years. This is going to be the mega S Club party of all time!"
S Club 7 formed in 1998 and rose to fame by starring in their own hugely popular BBC television series Miami 7. The pop group achieved four number one hits with songs like 'Reach' and 'Bring It All Back'.
They split in 2003, following Paul's exit from the band in 2002.
But after a 12-year hiatus, S Club 7 are now back! News of their reunion comes just days after the pop band set up a Twitter account, which has since been given the official verification blue tick.
Rumours of a S Club 7 reunion surfaced in July, when a group meeting sent fans into a frenzy.
Bradley actually made his return to the stage on Saturday night (18 October), when he stepped in for Blue's Simon Webbe at the 'Big Reunion Boy Band Tour'.
Apart from their Children In Need performance, S Club 7 have not confirmed any other plans, but fingers crossed they will do soon!
So, who's excited?!
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