Yes, the heavyweight champion of the world is coming to TG TV

He may have boxed his way to a world title, but what about when pitted against an even more dangerous adversary?

Yep, on this Sunday's show, we'll have none other than Anthony Joshua – the reigning IBF heavyweight champion of the world – as a star in our rallycross Mini.

His opponent? American comedian and film star Kevin Hart. Joshua is 6ft 5in. Hart is, um, not.

TG.com caught up with the pair as they attempted their laps around our brand new circuit. We also treated them both to a hot lap with Mr Stig in an Audi R8.

Click play to see what happens when you put a boxing champ and American comedian in a car with a man who isn't machine-washable...