Gennady Golovkin will defend his IBF, WBA, WBC and IBO Middleweight World titles against IBF Welterweight champion Kell Brook at The O2 in London on September 10.
The two unbeaten stars collide in London and GGG is up for the clash.
“I’m very excited to be fighting in front of the great British boxing fans and promise another ‘Big Drama Show’ against Kell Brook,” said Golovkin.
Brook – who will retain his status as IBF Welterweight champion – has been hunting a major fight since landing the World title, and the 30 year old believes he has the tools to defeat Golovkin and become boxing’s biggest star.
“This is the fight and the moment I have been waiting for for some time,” said Brook. “We’ve tried and tried to lure the best to come and fight me and now we’ve got the best of the best – the number one pound for pound fighter in the world is coming to the UK.
“When this fight got offered to me I accepted within minutes and I can’t wait. Everyone knows I’m a huge welterweight and I know I will carry my speed and accuracy and even more power through the weights.
“This is the ultimate fight, one of the biggest international fights the country has seen in many years - you have seen some huge names run from GGG but I’m running to him. I’m a Special fighter and I will show the World on September 10.”