According to Bride Blush, Anna was known as "Whiplash Wallace" due to her fiery temper and ended her relationship with the future king of England after being ignored all night by her date at the Queen Mother's 80th birthday ball.
It is alleged that Anna told Charles: “I have never been so badly treated in my life. You’ve left me alone all evening and now you will have to continue without me.”
According to 9Honey, after Anna royally dumped Charles the young prince was under considerable pressure by the Crown to find a suitable wife.
Charles eventually met Lady Diana Spencer in 1980, and the two would wed in front of millions on July 29, 1981.
WATCH! This new biography reveals Prince Charles never wanted to marry Diana