Time for a rundown of the other big royal event of the weekend: Trooping the Colour!
No surprise here: the Queen chose the Guards Brooch for her birthday parade. She's worn it at every Trooping the Colour ceremony since the late 1980s.
The Duchess of Cornwall donned diamond and pearl earrings, a strand of large pearls, and an heirloom royal brooch. The diamond brooch with the cabochon emerald drop features the Prince of Wales feather design. It was given as a wedding present to Queen Alexandra by the Ladies of Bristol in 1863.
The Duchess of Cambridge kept her jewelry to a minimum, wearing only her usual rings and a pair of diamond and aquamarine earrings.
As usual, the York princesses wore little jewelry. Princess Beatrice's bracelets are visible above.
Princess Anne was decked out in military bling, as she rode on horseback in the sovereign's procession behind her mother's carriage. In a way, she's following in her mother's footsteps by doing so, as the Queen rode in the parade in military dress until the mid-1980s.
No jewelry yet for Lady Louise Windsor, who (with her younger brother, Viscount Severn) represented the Wessex family, as her parents were in Stockholm attending the royal wedding.
The Duchess of Gloucester rode in the carriage procession with the Duke of Kent. She wore an intriguing pair of clips on her collar -- are those diamonds and rubies I spy?
We also got pictures of a few other ladies from the extended Windsor family. Princess Michael of Kent wore pearls with a very sparkly brooch. Her daughter, Lady Gabriella, is standing behind her, wearing glittering earrings.
And here's Lady Helen Taylor, daughter of the Duke and Duchess of Kent, wearing a striking necklace. (She's standing with her daughters, Eloise and Estella.)
But of course, one person stole the show during the annual balcony appearance: Prince George of Cambridge, who waved like a pro already. So cute!
That's it for this year's Trooping jewels -- stay tuned for more from this jam-packed royal week, with posts on Garter Day and Royal Ascot!