Now 94, the Queen was a 21-year-old princess when she married Lieutenant Philip Mountbatten (now 99) on 20 November 1947.
Her Majesty and His Royal Highness are seen looking at a cheerful, colourful anniversary card made by their great-grandchildren Prince George, Princess Charlotte and Prince Louis, alongside other cards and letters sent by well-wishers.
The photograph was taken earlier this week in the Oak Room at Windsor Castle.
The Queen and the Duke, who has retired from public duties, are spending the lockdown at Windsor Castle and anniversary celebrations are expected to be low key.
Prince Philip’s 100th birthday will be in June and plans are already underway to commemorate the Queen’s Platinum Jubilee, which will mark 70 years on the throne, in 2022.
We are sure you would like to join us in sending them warm congratulations, and wishing them many more anniversary celebrations for the future.
There are no traditional gifts for the 73rd wedding anniversary but, considering the time they and other couples have spent together, a family celebration would make this special occasion another opportunity to create some lasting memories for all.