Britain's Duchess Catherine has been accompanying Prince Charles on several visits to the opera.

The duchess - who married Charles' son Prince William in April - and her father-in-law have attended the Royal Opera House several times to see a variety of different productions.

The Duchess of Cambridge and the Prince of Wales have made several private visits to the Royal Opera House together, before and since the royal wedding, to watch opera and ballet productions

It is believed the visits are part of Charles - who has a lifelong love of ballet and opera - wanting to encourage Catherine's interests in the arts with a proposed plan of her supporting the prestigious London venue in an official capacity.

A source told the Daily Telegraph newspaper: "The Duchess of Cambridge and the Prince of Wales have made several private visits to the Royal Opera House together, before and since the royal wedding, to watch opera and ballet productions. Both have been very enthusiastic about the productions they have seen together."

Among the productions the royal pair have enjoyed together is the Royal Ballet's 'Alice's Adventures in Wonderland', with Catherine having a keen interest in author Lewis Carroll, even writing her university dissertation on his photography.

Charles is particularly close to the duchess, and last month described her as his "darling daughter-in-law" when she stepped in to fill in for him to host a charity dinner at Clarence House.

The evening marked her first official solo engagement.