Buckingham Palace says Queen Elizabeth II is feeling poorly and has cancelled a planned appearance.

Britain's Queen Elizabeth and Meghan, Duchess of Sussex attend the Queen's Young Leaders Awards ceremony at Buckingham Palace in London, Tuesday, June 26, 2018. (John Stillwell/Pool Photo via AP)

Britain's Queen Elizabeth and Meghan, Duchess of Sussex attend the Queen's Young Leaders Awards ceremony at Buckingham Palace in London, Tuesday, June 26, 2018. (John Stillwell/Pool Photo via AP)

The palace said in a statement that the 92-year-old monarch "is feeling under the weather" and will not attend a morning service at St. Paul's Cathedral on Thursday. The service marks the 200th anniversary of the Order of St. Michael and St. George.

The queen has had a busy schedule in recent weeks, including appearances at the Royal Ascot horse show.