Kate Middleton, Prince William: Raucous and Risque!

Prince William and girlfriend Kate Middleton made it clear last night: they are back together!

The famous British couple got down up on the dance floor at a raucous (and risqué!) charity event in London.

According to People, Middleton kissed her longtime boyfriend as the pair showed off their dance moves as though they were Karina Smirnoff and Mario. The price twirled his gal around as they boogied to Little Richard's "Tutti Frutti" and the Guns N' Roses classic "Welcome to the Jungle."

"They looked happy and so in love," a witness said. "Kate was smiling so widely and they looked like there was no one else in the world when they were dancing."

The pair â€" plus Prince Harry, who's just back from his African holiday with Chelsy Davy â€" were attending an event for The Henry van Straubenzee Memorial Fund. (Henry, a school pal of Harry's, died in a car crash in 2002.)