The Duke of Sussex will stand guard over his grandmother's coffin during her funeral on Saturday, Buckingham Palace has revealed.
Harry, who is currently in the UK after flying back from his new home in California.
It will be among 30 members of the royal family taking part in the ceremonial event.
It is thought to be the first time he has taken on an official duty since he and Meghan Markle announced they were stepping back as senior royals in January.
The duke is expected to wear military uniform for the occasion.
As he did when he walked behind his grandfather Prince Philip's coffin at his funeral last month.
Harry will be joined by his cousin Peter Phillips, the son of Princess Anne, as they stand on either side of the Queen's catafalque in St George's Chapel at Windsor Castle.
The Duke of Sussex is said to have 'no regrets' about returning to the UK for his grandmother's funeral (Eddie Mulholland/The Telegraph)
The funeral will be a sombre affair, in line with coronavirus restrictions, with just 30 guests allowed to attend.
The Duke of Sussex is said to have "no regrets" about returning to the UK for his grandmother's funeral, despite the risk of upsetting his pregnant wife Meghan.