Prince William let his hair down last night - having a drink with Guy Ritchie before enjoying a sexy dance with a brunette in a nightclub. The 26-year-old stopped at Ritchie's pub The Punch Bowl in Mayfair before heading off to shake his regal booty at nearby Whisky Mist.

Disco dancer: Prince William

The club was having a 1940s themed night - but for Wills it was more like a phwoarties night. There was no sign of his girlfriend Kate Middleton as he took to the dancefloor to throw some royal shapes, and gyrated with a hot young brunette.

The girl, named Kirsty, told us: "I couldn't believe that I was dancing with the future King of England. I t was a crazy night. At one point he was gyrating behind me and I wa s thinking, 'Is this for real?' I made it my mission to try and get William p***ed but he was having none of it. I was telling him to do shots of Sambuca but he wouldn't."

Party-goers: the girls were having fun

Kirsty, a former model, stayed until the end of the night while Prince William left shortly after 2am with his personal protection officer.

Kirsty added: "I've never met him before but if he was here again I'd love dance with him again."

The prince was at the retro night after being invited by close pal Guy Pelly.

While it was supposed to be a fancy dress night, William soberly decided to stick to his usual " uniform" of blue velvet jacket, denim jeans and striped shirt.