The Duke and Duchess of Cambridge touched down in Dublin on Tuesday for the start of their three-day visit.
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 Duchess of Cambridge looked regal while showing off her natural athleticism during a SportsAid event at London Stadium.
The Duke and Duchess of Cambridge were all smiles as they greeted the crowd.
The Duke and Duchess of Cambridge announced they will be taking a three-day trip.
Kate Middleton and Prince William are busy promoting their new mental health campaigns.
The Duchess of Cambridge candidly talks about introducing Prince George to the world in 2013.
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.
Is this the new Fab Four?!
ET has learned that Prince William and Prince Harry are 'talking more' since news of Harry's royal exit was announced last month.
'William has always watched out for his younger brother.'
