LONDON — Queen Elizabeth II, the longest-reigning monarch on the planet, is not afraid to spill tea.

The queen opens up the vault, if you will, in a BBC documentary that examines what she calls her “horrible coronation” nearly 65 years ago.

Her dry sense of humor is on full display as she trots out the crown she wore and gives deadpan reviews about the lavish and long ceremony, summing up what it all means in an interview with the royal family reporter Alastair Bruce.

He told InStyle that she had described the 1953 coronation as a “pretty challenging day for her as a 25-year-old.” The monarch also watched scenes of the coronation she had never seen before.