The entire world has literally watched these two grow up from the adorable tykes of Princess Diana and Prince Charles **to teens and now – they're drool-worthy princes whose every move is photographed by the paparazzi: they're **Prince William and Prince Harry.

Are these two royalty brothers capable of being one of the regular folks by playing biker dudes? Apparently, they are.

According to the Associated Press, Princes William and Harry are joining 20 other riders on a 1,000-mile, 8-day trek via motorcycle rally in South Africa. It's called the "**Enduro Africa '08**" event which will benefit UNICEF, the Nelson Mandela Children's Fund & Sentebale, as well as Prince Harry's charity for disadvantaged children.

So what does the royal sibling expect from the event? The princes joked that they're betting as to who takes more spills over the course of the bike rally.

"It's going to be very challenging and we're expecting to fall off many a time," said 24-year-old Harry.

"We both ride bikes at the moment but on-road biking is completely different. All the off-road stuff is up hills, down slopes, across rivers and is all rocky and hilly," added William, 26.

Photo Credit: The Insider