The Queen has visited the Duke of Edinburgh in hospital in Cambridgeshire, where he has been treated for a blocked coronary artery.
The duke, 90, had a coronary stent fitted after he was taken to hospital suffering chest pains.
He is in "good spirits" but remains under observation at Papworth Hospital, Buckingham Palace said.
The Queen was accompanied on the 45-minute visit by their sons Edward and Andrew, and daughter, Anne.
They arrived by helicopter for a 45-minute visit, where they were met by the hospital's chief executive and Professor John Cunningham, chief physician to the Queen.
After they left, the Prince of Wales and the Duchess of Cornwall arrived by car from Highgrove.