Elizabeth II is the Queen of the UK and the other Commonwealth realms. She was born in London as the first child of the Duke and Duchess of York. They later became King George VI and Queen Elizabeth.
The queen’s husband, Prince Philip, who turns 98 years old on Monday, did not attend; he has rarely been seen in public since entering retirement.
The queen, with members of her family, is scheduled to watch the Red Arrows air show from the balcony of the palace.