Meghan Markleis continuing her busy royal week.

On Tuesday, she joinedPrince Harry,Queen Elizabeth,Prince William,Kate Middleton,Prince Charles,Camilla, Duchess of Cornwalland other members of the royal family to mark the 100th birthday celebrations of the Royal Air Force.

The day afterthe christeningofPrince Louis,the family attended a Westminster Abbey service to honor the world’s first independent air force, which was set apart from the British Army and Royal Navy on April 1, 1918.

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Members Of The Royal Family Attend Events To Mark The Centenary Of The RAF

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HRH Queen Elizabeth at Westminster Abbey for the 100 year celebration of the Royal Air Force

Queen ElizabethandPrince Philipwere noticeably absent from Monday’s christening after the palace announced that the royal couple would not be in attendance. The decision, which was likely due to her busy schedule, was “mutually agreed” between the 92-year-old monarch and William and Kate “some time ago,” a palace source tells PEOPLE.

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100th Anniversary of the Royal Air Force, Westminster Abbey, London, UK - 10 Jul 2018

Kate, who took over fromPrince Philipas Honorary Air Commandant of the Air Cadets in December 2015, attended the event despite still being on maternity leave. She also wore the diamond Dacre Brooch she received for being patron of the air cadets.

Members Of The Royal Family Attend Events To Mark The Centenary Of The RAF

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The Queen and other Members of the Royal Family attend Westminster Abbey to mark the centenary of the RAF

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After a short speech, the Queen headed back into the palace, where Meghan and the rest of the family were set to join her on the balcony to observe a thunderous flypast. The event is to feature 100 aircraft — including jet fighters, a WWII Lancaster bomber and the ceremonial Red Arrows — while below there will be aFeu de Joie,or mass rifle salute.

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Westminster Abbey Service To Commemorate The Royal Air Force’s 100th Birthday

Meghan made her debut on the famous balcony for theannual Trooping the Colourin June, which celebrates the Queen’s birthday.

Soon after the flypast, Meghan and Harry — the newDuke and Duchess of Sussex— will head toDublin for their first official overseas visitsince theirMay 19 wedding. They are scheduled to touch down in Ireland around noon ET.

source: people.com