12:44 PM PT -- The group just released a statement, saying, "We have enjoyed a wonderful afternoon catching-up and reminiscing about the amazing times we have spent together. We are always overwhelmed at how much interest there is across the whole world for The Spice Girls.

The time now feels right to explore some incredible new opportunities together. We all agree that there are many exciting possibilities that will once again embrace the original essence of The Spice Girls, while reinforcing our message of female empowerment for future generations."

The Spice Girls are 5 again ... Baby, Sporty, Scary, Ginger AND Posh are all officially under the same roof.

Victoria Beckham posted a pic of the girl group and she certainly teased some type of possible reunion with the caption, "Love my girls!!! So many kisses!!! X Exciting x."

We got pics of Mel B, Mel C and Emma arriving at Geri Halliwell's London pad early Friday, but there were no signs of Posh ... which dampened hopes for a full reunion.

Turns out she must've ducked in the back, keeping hope alive!

Geri's reportedly down for a reunion as long as it doesn't require a full tour ... ditto for Victoria.