Harry, Meghan, William and Kate to reunite for one final appearance

All eyes will next week be on the Commonwealth Day service on March 9. Photo / Getty Images

As Prince Harry and Meghan Markle are set to make their final appearances as royals, they will also be making their last appearance as part of the royal fab four.

The Duke and Duchess of Sussex are set to attend the annual Commonwealth Day service at Westminster Abbey with the Duke and Duchess of Cambridge.

However, once the festivities are over, the couple will depart for Canada to start their new, "financially independent" life with son Archie.

Buckingham Palace today confirmed the couple would attend the event – making it the first time they will appear with the royal family in public since dramatically announcing they were quitting.

Harry and Meghan caused a royal crisis by revealing they wanted to step back from their roles as senior royals and become financially independent while still supporting the Queen.

But the plan was unworkable, and the couple are now dropping their HRH titles and stepping away from the monarchy completely from March 31.

And all eyes will next week be on the Commonwealth Day service on March 9 for their last event in the UK.

Tradition dictates that sixth-in-line Harry sits with Meghan in the second row of seats behind the Queen, Charles, Camilla, William and Kate during the service.

The couples are set to make one final appearance together. Photo / Getty Images

Last time Meghan and Harry attended the service was in 2019, when the Duchess was pregnant with Archie.

And the Sussexes faced speculation of a rift between themselves and the Cambridges after the couples were initially dubbed the Fab Four.

But the brothers have since reportedly healed their feud – both fearing the breach might never have been fixed when Harry moved.

Now, Meghan and Harry are expected to forge ahead with their new life, although questions remain over exactly how they will fund it.

Harry has returned to the UK for his last whirlwind of engagements – first giving an eco-talk in Scotland before joining Bon Jovi to promote the Invictus Games.

Jon Bon Jovi joked Harry was the "artist formerly known as prince" and said he'd never forget the experience.

This year's Commonwealth Day service will be broadcast live on BBC One and across the BBC World Service on March 9.

International boxing champion and Olympic gold medallist Anthony Joshua will deliver a reflection, while singers Alexandra Burke and Craig David will perform.

Guests of honour among the 2000-strong congregation will include Prime Minister Boris Johnson, the Commonwealth secretary-general Baroness Scotland, high commissioners, ambassadors, faith leaders and more than 800 schoolchildren and young people.