During a diplomatic reception at Buckingham Palace, then-Prime Minister Margaret Thatcher felt faint and was forced to sit down for the second year in a row. Elizabeth said to a nearby guest, "Oh, look! She's keeled over again."
Princess Margaret was talking to her cousin's husband Denys, a thriller writer, and asked him how his latest book was coming along. Elizabeth entered the room as he responded, "I desperately need a title." She quipped, "I cannot think of a reason for giving you one."