She was the last to arrive before the bride.
Normally, as the most senior member of the royal family, protocol dictates that the Queen arrives last to events and engagements; however, exceptions are made in the case of weddings, so she exited her car just before Meghan drove up to St. George's Chapel.
Wearing bright green is the ultimate power move.
at an American wedding might be seen as trying to steal focus from the bride, the Queen always wears vibrant colors, and her grandson's wedding day is no exception.
Sophie, Countess of Wessex her mother-in-law's penchant for rainbow shades in the documentary The Queen at 90. "She needs to stand out for people to be able to say 'I saw the Queen,'" she said.
The Queen's biographer Robert Hardman, once , "I can never wear beige because nobody will know who I am."
She had the best seat in the house.
While some people assumed the empty seat next to Prince William during the ceremony was a tribute to the late Princess Diana, and her absence at Prince Harry and Meghan Markle's wedding, in reality it was a matter of royal protocol.
Reporter Rebecca English explained that the seat in front of the Queen is always left empty, presumably so she can have a nice view.
"Btw - I’ve seen some reports about the spare seat by Prince William in the chapel as having being left in memory of Princess Diana. It wasn’t empty for that reason. The seat in front of the Queen is always left empty, I am told by BP ," she shared on Twitter.
She also revealed that particular seat is the Queen's favorite.
She didn't sing 'God Save the Queen' at the ceremony.
I guess when you think about it, it might be strange to sing a song about yourself.
When she was finished eating at the reception, everyone was finished eating.
It's an unspoken rule of royal dining etiquette that once the Queen takes her last bite, so have you.