The brothers were spotted leaving the London Clinic earlier recently where Queen Elizabeth II's husband is resting up after recently undergoing surgery.
Will and Harry stepped out in almost-identical dark suits and white shirts. They were accompanied by their father Prince Charles and his wife Camilla.
The 92-year-old royal was hospitalized over a week ago to undergo surgery to his stomach.
"His Royal Highness The Duke of Edinburgh is progressing according to plans at this early stage," Buckingham Palace said in a statement this week. "He is comfortable and in good spirits."
On Monday, the Queen visited Philip on his birthday.