Equally, whether Prince Andrew will play an official part in the proceedings has not been clarified by Buckingham Palace – though a recent report in the Times has claimed that neither the Duke of Sussex nor York will be part of the procession, as this will be limited to working royals.
Prince George, Princess Charlotte and Prince Louis will all reportedly play a part in their grandfather's coronation on 6 May, by joining in the procession at the end of the Westminster Abbey service.
The Times also reported that the procession back from the Abbey to Buckingham Palace will be “a third of the size” that the late Queen enjoyed at her 1953 coronation.
Yahoo UK breaks down everything we know about Harry and Andrew's appearance (or non-appearance).
Will Harry and Andrew attend the coronation?
Meghan and Harry’s spokesperson has confirmed they have been invited via email though it is understood that formal invitations will be sent out by the palace closer to the date.
Their presence could potentially overshadow the coronation, given the recent breakdown in Harry's relationship with his brother and father.
However, their absence would also doubtless generate additional unwelcome publicity – creating a difficult PR situation to manage.
Despite that both Harry and Andrew have been at major royal occasions since stepping down as working royals — Harry was present at the Platinum Jubilee last year and Andrew took part in the annual Christmas Day walkabout on the way to church, the first since Charles became monarch.
But in Harry's most recent public appearance on 27 March for a high-profile court hearing, the palace was reported as saying that Charles was "too busy" to meet his son – despite the King's planned trip to France on the same day being called off just days before.
In addition, other unverified reports have also suggested that Prince Archie, three, and Princess Lilibet, one, have “yet to be invited” to the coronation – which is set to take place on Archie’s birthday.
Will Harry and Andrew play a role in the coronation ceremony?
In January, the Sunday Times reported that the main role Harry and Andrew could have played in the coronation ceremony had been adapted and wouldn’t include them.
Traditionally, royal dukes ‘pay homage’ to the newly crowned monarch – for the Queen's coronation in 1953, this was led by the Duke of Edinburgh before other dukes did the same.
However, the report claimed that in Charles’s coronation, the only duke to pay homage will be the Prince William.
The Prince of Wales, therefore, could be the only person to kneel and pledge to be the King’s “liege man of life and limb”, before then touching the crown and kissing the monarch’s cheek.
Which royals are taking part in the ceremony?
Alongside William, the other "working royals" – Kate and their children, the Duke and Duchess of Edinburgh, the Princess Royal and her husband Vice-Admiral Sir Tim Laurence, the Gloucesters, the Duke of Kent and Princess Alexandra – will all reportedly take part in the procession back to Buckingham Palace after the ceremony.
Camilla’s grandchildren – although not strictly royals – are also reported to be taking part and will hold the canopy over her while she is anointed with holy oil and consecrated as Queen.
This part of the ceremony was not televised during the Queen Elizabeth’s coronation as the moment is seen as one of spiritual transformation and it was deemed to be too sacred for public viewing.
Watch: The real story of the Royal Family's dysfunctional life behind closed doors