Published Friday, 16 May 2014
The pair will join other motoring enthusiasts and stars including David Hasselhoff, rapper Eve, and music producer Deadmau5 for the 3,000-mile trek across two continents.
The seven-day event next month begins in Miami, Florida, and ends in Ibiza, Spain, via New York and London, and the two hip-hop stars are the latest famous faces to sign up.
Tinie Tempah is keen to show off his motoring skills during the event, but his rival Dizzee Rascal may have an unfair advantage - he will be competing in the world's fastest supercar.
The Bonkers hitmaker will be climbing behind the wheel of a £1m Bugatti Veyron for the rally.