Eve, Pimp My Ride host Xzibit, and Idris Elba (Stringer Bell from The Wire), are among the stars taking part in a supercar race from London to New York.
The celebrities are driving a range of ultra-expensive, high performance vehicles, including an Aston Martin DB9, and Bentley Continental GT.
Also competing in the event are Prichard and Joycey from Dirty Sanchez, and skateboarding legend Tony Hawk.
Dizzee Rascal was due to join the race, but had to drop-out because he is too busy.
The course, which is driven on public roads, will take them through the Netherlands, Denmark, and Sweden.
Competitors then fly to Boston, before heading down the East coast of the United States to New York.
The annual Gumball 3000 Rally has proved highly controversial in the past.
Several drivers have been arrested for speeding, and had their cars impounded.
In 2007, a Porsche 911, driven by businessman Nicholas Morley, crashed into a VW Golf in Macedonia.
The Golf's driver, Vladislav Cepunjovski, and his wife Margarita, were both killed.
Morley was convicted of "endangering traffic leading to death" and given a two-year suspended sentence.