Prince Harry has been celebrating his 21st birthday by partying on a houseboat in Botswana.

The British royal has taken his girlfriend Chelsy Davy, and 14 of their pals on a water safari in the Okavango Delta. The Kubu Queen party was completed with cans of beer, cigarettes and loud music.

According to a crew member quoted by Britain's The Sun newspaper: "They're having the time of their lives. We've provided extra supplies of beer and spirits for this trip".

"Harry is the life and soul of the party. They've been playing rock music at full blast, drinking, laughing and having a great time", the source added.

Harry, whose 21st anniversary will be on September 15, is very much enjoying the holiday, especially that his father, Prince Charles, has reportedly banned him from throwing a wild party back in England.

"Harry loves a good party and is very frustrated that his father has forbidden him from holding his own", a friend said.