Britain's Prince Harry will party in Las Vegas while training in the US.

The 26-year-old royal - who is renowned for a love of nights out - will spend 48-hours in the gambling city while undertaking a 12-week helicopter training course in California and Arizona later this year, as it is part of the "tradition" for those taking part.

A source told the Sunday Mirror: "It's traditional that guys on his course, which is split between California and Arizona, have a break in Vegas at the halfway point.

"The course doesn't have much downtime, it's pretty intense. This is a chance for pilots to let their hair down, kick back and enjoy themselves."

As part of his US training, Harry - who was recently promoted to a Royal Air Force Captain - will learn how to use weapons systems on board a helicopter and take part in mock combat missions with American forces.

He will also be taught techniques which will help him avoid surface-to-air missiles.

Harry recently enjoyed a holiday to Croatia, where he even jumped into a pool fully clothed at an open air nightclub on the island of Hvar.