Every year, thousands gather for Trooping the Colour, the nationally-recognized official birthday of the current monarch. Click through to see how the United Kingdom has celebrated Her Royal Highness Queen Elizabeth over the years.
Look at how small Prince Williams and his cousins are!
Ever the doting mother, Princess Diana hoists a tiny and rebellious-looking Prince Harry on her hip as they watch the parade from the balcony.
Her Royal Highness Queen Elizabeth surveys the crowd that gathered to celebrate her birthday, sporting a smart pea green suit and matching hat.
The Queen is joined by her husband Prince Philip and their son Prince Charles on that iconic balcony.
Prince Michael of Kent is total beard goals at the 2002 Trooping th Colour festivities.
Princess Alexandra, first cousin of the Queen, and the Duchess of Gloucester leave Buckingham Palace for the parade.
Princess Eugenie looks absolutely precious in her baby blue outfit for the big day. Check out that smile!
Just in case you forgot, everyone was in ~love~ with Prince William growing up. This is why.
Fun fact: the hat that Prince Philip is sporting is called a bearskin, and yes, it's really made out of the fur of American black bears. Sad.
Raise your hand if you're feeling personally attacked by Prince Harry's adorably shy smile. So! Precious!
Even former Prime Minister Tony Blair turned up for the festivities, taking in the sights of parade from the stands.
Yellow hat, yellow dress, yellow parasol—Her Majesty pretty much invented monochromatic fashion.
Prince Philip stands at attention in his uniform and offers a formal salute for the occasion.
Princess Anne dresses in a cool military uniform and rides on horseback during each Trooping the Colour because she's one of many royal colonels.
Other royal colonels include her brothers Princes Charles, Andrew, and Edwards as well as the Dukes of Kent and Gloucester.
Princess Anne and the members of her royal regiment gather for a quick photo-op in Hyde Park after the parade.
If anyone knows anything about fascinators, it's the royal family. Just check out the cool headpieces that Princess Beatrice and the Countess of Wessex have on!
Never one to shy away from bold colors, Queen Elizabeth stuns in a lime green outfit for her big day. She's been rocking neon way before it even became trendy—keep up, girls!
Her Majesty can barely contain her approval of her royal guard as she inspects them.
LOL! Caption this:
The Queen is rarely spotted out and about without one of her many antique brooches (including this super shady one), many of which have been in the royal family for centuries.
Daily mood: Prince Harry's disgruntled pout.
Fully obsessed with the Duchess of Cornwall's floral fascinator. One word: Stunning.
Even after 72 years of marriage, Queen Elizabeth still looks at Prince Philip with heart eyes. Couple goals.
10 years before his son Archie Harrison was born, Harry was giving us a glimpse into his future as an amazing dad. *dreamy sigh*
Hey, royal family fans? We need the name and make of the lippie Queen Elizabeth has on—please and thank you!
A few months after her April wedding to Prince William, Kate Middleton made her Trooping the Colour debut as the Duchess of Cambridge.
Lady Louise Windsor is so, so, so CUTE.
Easy, breezy, beautiful Duchess of Cambridge.
Decked out from head to toe in a snazzy military uniform, Prince Harry certainly turned quite a few heads.