According to royal communications, the Duke of Edinburgh was admitted to King Edward VII Hospital in London, England, on Tuesday afternoon, for a planned surgery on his hip which will take place on Wednesday.
He did not attend a church service last week attended by the monarch because of a hip problem, a royal source said last week.
The Queen had marked Easter Sunday without Prince Philip at this years' service.
Officials declined to provide additional details about the surgery and said "further updates will be issued when appropriate". Over the last week, Prince Philip's health has prevented him from attending traditional Maundy and Easter services at Windsor Castle's St. George's Chapel alongside Queen Elizabeth.
It said that the hospital admission and surgery were planned ahead of time.