The Expendables star was joined by rapper Bun B and professional skateboarder Tony Hawk at the launch of the fundraising drive, which ends in Las Vegas on Saturday (30May15), with stops in Germany, Holland and Denmark.

Lundgren says, "There will be some fast paced days... This trip will not resemble anything I've done before."

Other stars join the race along the route will include Tommy Lee, DJs Deadmau5 and Afrojack, Gumball veteran David Hasselhoff and Formula One driver Lewis Hamilton.

Deadmau5 and Bun B will perform as part of a two-day concert planned to celebrate the end of the race in Las Vegas on Friday (29May15) and Saturday (30May15). DJ Diplo and rapper Eve are also scheduled to appear.