The 37-year-old Duchess of Sussex arrived at Buckingham Palace with her husband, Prince Harry, while the 36-year-old Duchess of Cambridge, sat in the passenger seat of Prince William’s car.
And while Princess Eugenie, Princess Beatrice, Camilla and Zara Tindall were all there, we couldn’t stop staring at Kate and Meghan’s glistening earrings.
The party for Prince Charles comes just hours after the royal family released new images of the 70-year-old with his adorable grandchildren and proud kids.
The photos, which were taken by photographer, Chris Jackson, back in September, show Prince Charles and his wife, Camilla, the Duchess of Cornwall, sitting on a bench with five-year-old Prince George and three-year-old Princess Charlotte.
Behind them Prince William can be seen beaming, while his wife, Kate Middleton, the Duchess of Cambridge, holds on tight to their precious six-month-old baby boy, Prince Louis.
The 36-year-old Duchess of Cambridge was pictured wearing a stunning polka dot Alessandra Rich midi dress, which was previously seen on Meghan’s friend, Abigail Spencer at the royal wedding.
And while we all thought Kate was simply keeping with the blue and white theme going on in the pictures, it turns out her dress holds a significant meaning.
Prince Wiilliam and Prince Harry’s mother, Princess Diana, actually wore a near-identical dress to Kate’s back in 1985, when she was pictured with her lady in waiting and private secretary, Anne Beckwith-Smith.
Princess Diana wore a long-sleeved polka dot dress, with shoulder pads and a dramatic white collar.
Meghan Markle meanwhile wore a white and navy structured Givenchy dress.
And while the Queen wasn’t pictured, she gave a gushing tribute to her son at his birthday party.
“It is a privilege for any mother to be able to propose a toast to her son on his 70th birthday,” she started the speech.
“It means that you have lived long enough to see your child grow up. It is rather like —to use an analogy I am certain will find favour — planting a tree and being able to watch it grow.
“My mother saw me turn 70, of course. And she was heard to observe that 70 is exactly the age when the number of candles on your cake finally exceeds the amount of breath you have to blow them out.
“Over his 70 years, Philip and I have seen Charles become a champion of conservation and the arts, a great charitable leader — a dedicated and respected heir to the throne to stand comparison with any in history — and a wonderful father.
“Most of all, sustained by his wife Camilla, he is his own man, passionate and creative. So this toast is to wish a happy birthday to my son, in every respect a duchy original. To you Charles. To the Prince of Wales.”
Got a story tip? Send it to firstname.lastname@example.org
Or sign up to our daily newsletter here.