Dancing duke draws cheers during visit to centre for homeless youngsters

The moves involve brushing imaginary dust off your shoulders as your partner copies you – signalling you have trendy threads.

Inspiration struck for the second-in-line to the throne as he discussed his wedding outfit with a group of young women who are clients at Centrepoint’s Camberwell Foyer for troubled young people.

Prince William, who as a Colonel of the Irish Guards wore the regiment’s tunic when he wed the duchess in April, asked Vanessa Boateng, 18, about his uniform.

The teenager, a trainee nursery nurse who moved to the Foyer after family problems, said: “He said, was his suit dapper?

“I said: ‘No, your swag was on point.’”

He repeated my words and said ‘swag’, then he started doing this dance.” Later during a reception for many of the Foyer’s 80 residents the prince called Miss Boateng over and he and the 18-year-old performed the dance for the cameras as everyone screamed and cheered – brushing their shoulders in unison.

Miss Boateng, from Brixton, added: “I think he’s really cool, he’s really a down-to-earth person.”

Both the prince, the charity’s patron for six years, and the Duchess of Cambridge also took part in a cookery class where people were learning healthy eating. When they joined a group decorating biscuits the duchess made a heart shape from icing and covered it with hundreds and thousands.

She presented it to Tasha Barbi, who celebrated her 18th birthday yesterday, saying: “This is for your birthday - a birthday cookie.”

Miss Barbi, a student who had problems at home, said: “I’m going to cherish it – it really means a lot to me. I’m never eating it.”