The Queen has summoned senior royals to Sandringham on Monday for face-to-face talks to discuss the future roles of the Duke and Duchess of Sussex.
Palace officials told the BBC that Prince Harry, the Duke of Cambridge and the Prince of Wales would all attend, while Meghan is expected join the discussion over the phone from Canada.
The Sussexes say they plan to step back as senior members of the Royal Family.
There is no suggestion a conclusion will be reached at the meeting.
But BBC royal correspondent Jonny Dymond said it is hoped that the talks will produce a “next step” on the way to defining the couple’s new relationship with the Royal Family – in line with the Queen’s wish to find a solution within days.
He added that there were still “formidable obstacles” to overcome in the talks.