Genuine royalty met pop aristocracy at the Royal Variety Performance tonight, as Prince Charles shook hands with Lady Gaga, the Telegraph informs.

The singer also met the Duchess of Cornwall, who said: "My grandchildren call me Gaga".

The Duchess donned a full-length red gown for the occasion, while her husband was dressed in a sharp black tuxedo.

The royal couple also met Robbie Williams and charity bosses at the star-studded event at the Hammersmith Apollo.

The Duchess was given flowers by the young granddaughter of Bill Kenwright, producer of the performance, before the royal couple took their seats.

The show, which will be broadcast next week, is being hosted by comedian David Walliams.

Walliams led a group of people to the royal box, asking Charles and Camilla "can I see your tickets please?", before joking to the group: "There's some riff-raff here sitting in your seats."

Gaga and Williams are among the performers at the show, alongside Sting and Emeli Sande, while magician and Britain's Got Talent winner Richard Jones also takes to the stage.