This has of course sent shock waves through the sporting world, a race that will bring delight to the faces of all athletics fans.
The question on everybody’s lips though is: Who will win?
Will it be Mo Farah, the double Olympic champion over 5,000 and 10,000 metres who can range from 1500 metres to the Marathon?
Or will it be Usain Bolt, the twice triple Olympic champion over 100, 200 and 4x100 metres who has always been linked with moving up to the 400 metres?
It’s a mouth watering prospect - one that could become very close if the distance is right.
Former Olympic Gold Medallist Darren Campbell spoke to Sky Sports and said: "Usain Bolt is a 100m, 200m runner. There has been talk in the past about him moving up to 400m.
"But the pain sprinters feel when they move up to 400m is phenomenal. It's not a distance he would like to run but in aid of charity, 600m would probably be the limit.
"Usain would have been blessed with a tremendous amount of fast-twitch fibres. He wouldn't have a fantastic endurance pace.
"As a 100m, 200m sprinter a lot of the work he would do would be explosive work.
"The fact that he runs 200m means he will do over-distance work and 600m would probably be the limit of what he would do in training. He will run 600m but he won't run it very quickly".
It seems that if the distance is agreed at 600 metres then it could be an extremely close race.
Whoever wins, it can be guaranteed that this charity event will be a great stage to show case possibly the greatest sprinter of all time against one of the greatest long-distance runners of all time.
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