Melanie Brown, Emma Bunton, Geri Horner and Melanie Chisholm revealed details of the reunion tour in a video on social media on Monday.
Victoria Beckham, however, will not be taking part.
The girl group will kick off the tour at Manchester's Etihad Stadium on 1 June 2019, with tickets for all dates going on sale on Saturday at 10.30 GMT.
The foursome will also perform in Coventry, Sunderland, Edinburgh and Bristol, finishing at London's Wembley Stadium. They will be supported by Jess Glynne.