How the Duke of Gloucester is related to Queen - and what will happen to his titles

Prince Richard, Duke of Gloucester, 77, and his wife Birgitte, Duchess of Gloucester,

76, married on July 8, 1972. For the last five decades, the royal couple has supported

the Queen as working members of the Firm. To mark their anniversary today, the

Gloucesters have released a picture of themselves at home in their Kensington Palace garden.

In the stunning snap, the Duke was pictured standing with his arm around his wife's shoulder.

A beaming Duchess posed for the camera in a fitting

golden yellow shirt dress, and she held her glasses in her hand.

Birgitte paid a touching tribute to her husband with her choice

of accessory - a brooch designed by Richard that features an entwined 'R' and 'B'.