This is the first meeting between the Duke of Sussex and his grandmother since it was announced he would leave his senior duties.
The Palace confirmed that Prince William and Kate Middleton will join Prince Harry and Meghan Markle for the annual service on March 9.
The Fab Four will be at Westminster Abbey on March 9.
The all-new special, featuring interviews with royal experts and insiders, airs Monday, Feb. 17 on ET.
Could this be a glimpse into the future of Harry and wife Meghan Markle's life following their royal exit?
Royal duty calls! The Duke and Duchess of Sussex might have moved to Canada, but when the Queen sends you an invite, you don't say no.
The couple are supposed to be bringing their son, Archie, with them.
Peter is the son of Princess Anne and Mark Phillips.
The Material Girl tells Harry 'don't run off to Canada' in an Instagram video taken while getting her makeup done on Tuesday.
Queen Elizabeth II appointed the Duke of Cambridge as the new Lord High Commissioner to the General Assembly of the Church of Scotland.
Her Royal Highness was scheduled to attend a tea on Thursday, but had to pull out due to her health.
ET is breaking down Harry's final U.K. appearance, plus, all the notable reactions to his and wife Meghan Markle's royal exit.
A royal source opens up to ET about the Duke of Sussex's negotiations with his family.
Finally, we’re hearing from Harry himself, about what went into he and Meghan Markle’s decision to step back from the royal family.
