They certainly are an enduring testament to the power of marriage.
The Queen and the Duke of Edinburgh are celebrating their 70th wedding anniversary and, for the special occasion, they've been pictured in three new portraits.
British photographer Matt Holyoak snapped the couple, who will celebrate their platinum wedding anniversary with a private dinner in Windsor Castle, for Camera Press against a platinum backdrop (how apt!) in the castle's White Drawing Room.
The Queen is wearing a cream dress by Angela Kelly and a "Scarab" brooch designed by Andrew Grima and given to her as a gift from Philip in 1966.
To celebrate the 70th Wedding Anniversary of The Queen and The Duke of Edinburgh, new photographs are being released worldwide. (1/3) pic.twitter.com/zQBFjQTx3L
— The Royal Family (@RoyalFamily) November 19, 2017
Wishing a very happy 70th wedding anniversary to Her Majesty The Queen and His Royal Highness The Duke of Edinburgh. pic.twitter.com/UgztvxkWKS
— Kensington Palace (@KensingtonRoyal) November 20, 2017
— Clarence House (@ClarenceHouse) November 20, 2017
The marriage of the then 21-year-old Princess Elizabeth to 26-year-old Lieutenant Philip Mountbatten took place at Westminster Abbey on 20th November 1947.
The Queen, 91, is the first British monarch to celebrate a platinum wedding anniversary.
Philip, 96, has retired from royal duties this year.