Queen Elizabeth II ascended to the British throne 60 years ago this week.
Her Diamond Jubilee celebration has commemorated this rare feat - she's only the second monarch to rule that long - with a series of events in the past few days.
Here's Her Royal Majesty leaving a service of thanksgiving at St. Paul’s Cathedral earlier Tuesday (June 5) in London, England, which she attended with her family:
The 86-year-old has spent her Diamond Jubilee with many members of the Royal Family, including her son Prince Charles and his wife, Camilla, Duchess of Cornwall.
The Queen's grandchildren, Princess Eugenie, Princess Beatrice, Prince Harry and Prince William (with wife Kate Middleton) also participated in the festivities.
To mark the occasion, revered by Britons, U.S. President Barack Obama sent “heartfelt congratulations” to The Queen in a video message from the White House.
“As a steadfast ally, loyal friend and tireless leader, your majesty has set an example of resolve that will be long celebrated," the President told the Queen.
"As we work together to build a better future, it is gratifying to know that the bonds between our nations remain indispensable to our two countries and the world.”
“In honour of your 60 extraordinary years on the throne, communities across the commonwealth have lit thousands of Jubilee beacons,” Barack added.
“May the light of your majesty’s crown reign supreme for many years to come.”