Prince Philip is officially retired.
Prince Philip, who turned 96 in June, was at a parade at Buckingham Palace to mark the finale of the Royal Marines 1664 Global Challenge. The challenge, which raises funds and awareness for the Royal Marines Charity, sees royal marines from around the country running 16.64 miles each day for 100 days, totalling a distance of 1664 miles.
Since his wife Elizabeth II became queen in 1952, Prince Philip has also attended countless events by her side, but the nonagenarians have increasingly handed over responsibilities to the younger royals.
While the duke will no longer undertake royal engagements on his own, he still may attend events with her in the future from time to time, the Palace confirmed.More news: Indian troops kill two more youth in occupied Kashmir
Theresa May led tributes to the royal following the announcement earlier this summer, saying he had given the monarch "steadfast support" during his years of service, the Press Association reported.
It is one of more than 780 organisations of which he has been patron, president or a member.
"It's an honour for the Armed Forces having the Duke of Edinburgh's last public engagement with the Corps and the Royal Navy - it's brilliant, we're delighted".
The Duke has also made 637 solo overseas visits, and by Wednesday, he will have delivered 5,496 speeches during his time as the longest-serving consort in British history. "In taking this decision, The Duke has the full support of the Queen", read the palace's statement.More news: Solar eclipse less than month away
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The palace said Philip may still choose to attend events alongside the queen.
He announced his retirement in May this year, after completing more than 22,000 solo appearances, spanning seven decades. He has eight grandchildren, including Charlotte's father, Prince William.
Philip married Elizabeth at Westminster Abbey in 1947, and the couple are due to celebrate their 70th wedding anniversary in November.More news: Samsung's profit may top Apple's for the first time ever