Queen Elizabeth and Prince Philip just celebrated a major milestone when they had their 71st wedding anniversary on Tuesday.

Elizabeth and Philip officially have the longest marriage ever in the history of the British monarch. The couple was married at Westminster Abbey in 1947, and they have been together ever since.

Happy Anniversary Queen Elizabeth II and Prince Philip! The Royals are celebrating 71 years of marriage today! pic.twitter.com/LUdxE5Ajr4

— The Daily Buzz (@dailybuzztv) November 20, 2018

Elizabeth and Philip have actually known each other since 1934, when they met at the wedding of Princess Marina of Greece and Denmark and Prince George, the Duke of Kent.

#RoyalFlashback– Take a look at the Wedding of Queen Elizabeth II and Duke of Edinburgh at Westminster Abbey #OTD in 1947: https://t.co/0WIbXNg9vH pic.twitter.com/TwmBWUIDZZ

— The Royal Watcher (@saadsalman719) November 20, 2018

Unfortunately, the Queen did not have time to celebrate with Philip on her anniversary, as she had an incredibly busy week. Tuesday was also the 150th anniversary of the Royal Institution of Chartered Surveyors in Parliament Square, and to mark the occasion, the Queen made a public appearance wearing a bright pink double-breasted coat with a matching hat.

During her appearance, the Queen locked a time capsule that will be opened on the Institutions 200th anniversary and met “Women of the Future” award winners.

The Queen then locked a letter box shaped time capsule which will be reopened on the Institution’s 200th anniversary. pic.twitter.com/WB6wsdclJT

— The Royal Family (@RoyalFamily) November 20, 2018

The Queen is currently 91 while her husband Philip is 97. He retired from public duties last year.

Happy 71st Wedding Anniversary to Queen Elizabeth and Prince Philip! ? pic.twitter.com/cfD92jnNeX

— Helen (@Iettertodaddy) November 20, 2018

We would like to wish the Queen and Prince Philip a happy anniversary, and we hope they have many more to come!