These latest plans were handled by band member Mel B as they all put their differences aside to make it happen.
A source revealed: “The five of them have been locked in secret talks since the summer, and finally they are all on-board for a 2018 reunion.
“As it stands, they will be working together on a series of projects, which will include an album and a TV special celebrating the Spice Girls.
“And getting Victoria to agree has been a coup for everyone involved, given she has always been the person holding back on a reunion.”
“The fact she is on board now is down to how much closer the five of them have become recently.”
The former pop stars have been working with former boss Simon Fuller and reportedly came closer as they supported Mel B through her bitter divorce with husband Stephen Belafonte.