Rossi is set to get his hands on one of the Silver Arrows’ title-winning cars, while Hamilton will get to sample MotoGP machinery for the first time.
The seven-time premier class world champion on two wheels, Rossi has previously driven Formula 1 cars with Ferrari, while Hamilton tested World Superbikes motorcycles a year ago.
And the 40-year-old offered a peek behind the curtain as preparations for the swap continue.
Super excited to swap rides with the legend Valentino Rossi very soon… Watch this space guys. You ready @ValeYellow46? ??? @MonsterEnergy @MercedesAMGF1 @YamahaMotoGP #LH44VR46 pic.twitter.com/yVcalan8Vo
— Lewis Hamilton (@LewisHamilton) December 5, 2019