In February 1972, Birgitte van Deurs' engagement to Prince Richard of Gloucester was announced.

The marriage took place on 8 July 1972 at St Andrew's Church, Barnwell, Northamptonshire.

The Duke and Duchess of Gloucester live at Kensington Palace and have three children: (Alexander) Earl of Ulster (born 1974), The Lady Davina Windsor (now The Lady Davina Lewis, born 1977) and The Lady Rose Windsor (now The Lady Rose Gilman, born 1980). None of the children carry out official royal duties.

Their Royal Highnesses have a grandson, born in 2007 to The Earl and Countess of Ulster, who is known by the courtesy title of Lord Culloden.