Philip's surgery comes after he was forced to miss out on numerous events over the Easter period due to problems with his hip.
The Duke of Edinburgh has been admitted to hospital for hip surgery, Kensington Palace has announced.
Prince Philip has been admitted to a hospital to undergo a hip operation.
At the time of his retirement, Philip had completed 22,219 solo engagements since 1952, gave 5,496 speeches in his travels to more than 76 countries, authored 14 books, served as patron to 785 organizations and made 637 solo overseas visits, Buckingham Palace said.
In August 2017, the Duke retired from 65 years of public service, more than five years after the Palace originally said he would gradually "wind down" his workload, though he remained keen to carry out many of his duties. A spokesman said there would be further updates "when appropriate".
When it was announced past year that he would be retiring from official engagements, Buckingham Palace stressed that the decision was not health-related and he had the full support of the Queen.
Last June, he spent two days in hospital as a precautionary measure for the treatment of an infection and he pulled out of another event in March because of ill health, according to British newspaper reports. Middleton is expected to give birth this month.
However, the Duke of Edinburgh attended Christmas services with his family in December, and was seemingly in good spirits.
Katherine Lam is a breaking and trending news digital producer for Fox News.