Meghan and Harry make final official royal appearance at Commonwealth Day service

Meghan looked elegant in an emerald green long-sleeved dress by New Zealand designer Emilia Wickstead

Britain's Queen Elizabeth II leaves after the annual Commonwealth Service at Westminster Abbey in London, Britain. Reuters

Queen Elizabeth II leaves the annual Commonwealth Service at Westminster Abbey. EPA

Britain's Catherine, Duchess of Cambridge, right, receives flowers from a child after the annual Commonwealth Service at Westminster Abbey. EPA

Britain's Prince Harry, the Duke of Sussex and his wife, the Duchess of Sussex leave the annual Commonwealth Service at Westminster Abbey. EPA

Prince Harry, Duke of Sussex is introduced to performers as he leaves after attending the Commonwealth Day Service. Getty Images

Meghan, Duchess of Sussex talks with British boxer Anthony Joshua as she leaves after attending the Commonwealth Day Service. Getty Images

Queen Elizabeth II, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince Harry, Duke of Sussex, Meghan, Duchess of Sussex, Prince Edward, Earl of Wessex and Sophie, Countess of Wessex attend the Commonwealth Day Service 2020. Getty Images

Britain's Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex arrive to attend the annual Commonwealth Service at Westminster Abbey in London. AFP

Meghan wore a dress by New Zealand designer Emilia Wickstead. Getty Images

Britain's Prince William and Catherine, Duchess of Cambridge arrive for the service. Reuters

The service is the largest annual inter-faith gathering in the United Kingdom. AFP

Britain's Prince Charles, Prince of Wales (L) and The Very Reverend Dr David Hoyle, Dean of Westminster. AFP

Britain's Queen Elizabeth II arrives at the service. AP

The Duke and Duchess of Sussex attended the Commonwealth Day service at Westminster Abbey on Monday, their last official appearance as senior royals.

At the service, Harry and Meghan joined senior royals, including Queen Elizabeth II, Prince Charles and the Duke and Duchess of Cambridge.

Meghan looked elegant in an emerald green long-sleeved dress with a cape draped over one shoulder by New Zealand designer Emilia Wickstead and a hat by British milliner William Chambers, while Harry looked smart in a blue suit and tie.

The couple were greeted by senior officials including UK Prime Minister Boris Johnson. No one shook hands, presumably because of fears over the outbreak of coronavirus.

The Sussexes sat next to Harry's uncle Edward, Earl of Wessex and his wife Sophie, Countess of Wessex and in the row behind the Cambridges, Charles and the Queen.

Their appearance at the ceremony comes as they tie up a series of final engagements, before stepping back from life as working, senior royals. The final few engagements have been dubbed a "farewell tour" by royal watchers.

At the Commonwealth Day service, British singers Alexandra Burke and Craig David performed, and boxer Anthony Joshua read a reflection.

The service recognises is the annual celebration of the Commonwealth of Nations, typically held on the second Monday in March.

The event at Westminster Abbey is expected to be the final time the duke and duchess will be seen in a official capacity alongside the queen and other senior members of the British royal family.

From Tuesday, March 31, Harry and Meghan, along with son Archie, will split their time between the UK and Canada. The couple will now be financially independent from the British royal family's Crown Estate. It was announced in January that they would step away from their royal duties.

While Harry remains a prince, they have agreed not to use the HRH titles, His or Her Royal Highness, and will not use "royal" in their branding, even though they said there was no jurisdiction by the monarchy or the government to stop them using the word overseas.