It will be the first show the band have played since guitarist Graham Coxon quit after a bust up with the rest of the band in 2002.
But the chart-topping foursome have settled their differences and will perform at London's iconic Hyde Park on 3rd July 2009.
"It just felt it was right again," frontman Damon Albarn told NME. "It somehow feels like there's something for us to do again, we're not completely useless or pointless, we've got a reason to exist."
All tickets are £45.00, are limited to six per person, and subject to a booking fee. Rumours are now flying that the band will also perform at Glastonbury 2009.