The royal attended his grandfather's funeral on Saturday.
From navigating the pandemic to welcoming new great grandchildren, it has been a year of strength and leadership for the queen.
The British monarch won't host any celebrations for her birthday this year.
The pair connected last year.
Oswald died on Saturday, the same day as Prince Philip's funeral.
Royal Expert Katie Nicholl opens up to ET about the nuances of the Duke of Edinburgh's service.
ET is breaking down what you may not have known about the Duke of Edinburgh's funeral service.
The Duchess of Cambridge spoke with the brothers after Prince Philip's funeral on Saturday.
The family's Instagram concluded the day with one final tribute for the late Duke of Edinburgh.
The Duke of Edinburgh's family gathered as he was laid to rest on April 17.
The Duchess of Cambridge wore a historic set of pearls for the somber occasion.
The Duke of Edinburgh's family said their goodbyes on Saturday.
The estranged brothers were spotted chatting next to Kate Middleton following the service.
The 94-year-old British monarch honored her husband of 73 years during the televised service.
