Prince William bought a bit of US hip hop style to homeless charity Centrepoint on Wednesday night -- when he showed off some blinging dance moves.

The Duke and Duchess of Cambridge helped prepare mince pies during a visit to the centre in Camberwell, South London, before Wills showed he was down with 'da kids'.

Wednesday night fever: Kate laughs as Prince William dances with US
teen Vanessa Boateng. pic/afp

The 29-year-old prince began discussing his wedding outfit with one of the centre's attendees, Vanessa Boateng.

He asked the 18-year-old whether his suit had been "dapper", to which the teenager replied, "Your swag was on point."

The confused royal responded "Swag?" before brushing his lapel twice -- a dance move used in US rapper Jay-Z's 2003 single Dirt off Your Shoulder.

Kate laughed as her husband and Vanessa then performed an impromptu dance routine, which was quickly dubbed the "swag dance".

Vanessa said, "In the main foyer he called me over, he said we should do it again and people started taking pictures and filming us."

She told reporters later: "He's fantastic, he's great, me and him are friends."

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