Since much of "The Crown" is about humanizing the monarchy, I thought I'd share this anecdote I found over at theroyalforums.com, about halfway down the first post. Unfortunately, the site it's attributed to, anecdotage, doesn't seem to be around any more, so we must rely on the truth of the Internet for its veracity.

In 1979, Lady Diana Cooper (then 86 years old) attended a special event to honor the 100th birthday of the musical benefactor Sir Robert Mayer at Covent Garden. During the interval, Cooper found herself chatting with "an extremely pleasant lady" who seemed vaguely familiar. After struggling through some general conversation, Cooper noticed that the woman was wearing magnificent diamonds and suddenly hit upon her identity. "I sank into a curtsey," she later recalled, "and said 'I'm terribly sorry, Ma'am, but I didn't recognise you without your crown on.' The queen, not batting a royal eyelid, said, 'Well, I thought it should be Sir Robert's evening.'"