The Royal Family made their annual appearance on the Buckingham Palace balcony last year to mark King Charles' birthday during the Trooping the Colour parade, with lip reader Jeremy Freeman sharing what the Princess of Wales said to her youngest son

The Duke and Duchess of Sussex's last Trooping the Colour in 2019 saw the couple share what appeared to be an awkward exchange on the Buckingham Palace balcony

A lip reader has decoded what Prince Louis asked his brother before the pair waved to crowds at the King's birthday parade last year