Spice Girls to Perform at London 2012 Closing Ceremony!

Melanie Brown, Melanie Chisholm, Geri Halliwell, Emma Bunton and Victoria Beckham of the Spice Girls attend a press launch of new Spice Girls musical "I'll Tell You What I Want What I Really Really Want..." at The St. Pancras Renaissance London Hotel on June 26, 2012 in London, England. Credit: Dave Hogan/Getty Images

Say they'll be there!

The London Olympics are about to get a whole lot Spice-ier: a source confirms to Us Weekly that the Spice Girls are set to perform at the closing ceremony on Sunday.

Ginger (Geri Halliwell), 39, Baby (Emma Bunton), 36, Sporty (Melanie Chisholm), 38, Scary (Melanie Brown), 37, and Posh (Victoria Beckham), 38, are all expected to show; the group will perform two of their singles, including the 1996 fan favorite "Wannabe." (George Michael, The Who and Jessie J are also slated to perform at the event.)

In June, the Girls -- who split up in 2001 -- reunited for the first time since their 2008 reunion tour to announce the creation of a West End musical based on some of their biggest hits, a show titled Viva Forever.

"I loved what the Spice Girls did for women's confidence," producer Judy Craymer said during a press conference. "There's something very empowering about them."

Added the musical's writer Jennifer Saunders (who cocreated Absolutely Fabulous), "The second I knew this project was up for grabs, I rang my agent and said I had to be involved."