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Prince Philip, the husband of Britain's Queen Elizabeth II, has passed away at age 99.

The news was announced by Buckingham Palace on Twitter on Friday, April 9.

"It is with deep sorrow that Her Majesty The Queen has announced the death of her beloved husband, His Royal Highness The Prince Philip, Duke of Edinburgh," the tweet read. "His Royal Highness passed away peacefully this morning at Windsor Castle."

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Many in England are wondering if Harry Windsor and Meghan Markle will attend the prince's funeral.

Harry was "advised to fly home right now to day goodbye to his grandfather," a source told The Royal Observer.

Meghan will likely remain in California until their baby is born.

The couple bad-mouthed the Royal family in a recent tell-all interview with Oprah Winfrey.

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The news comes after Prince Philip spent 28 nights in a hospital, after being treated for a serious infection and undergoing heart surgery in March.

The Duke retired from royal duties in 2017. In January, Philip was involved in a car crash after he pulled out onto the main road near the Queen’s Sandringham Estate in Norfolk, England.

The royal was uninjured in the crash but two people in the other car were hospitalized.

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Born in Greece, Prince Philip joined the navy in 1939 and fought in World War II. During the war, he corresponded with the then-teenage Princess Elizabeth, and they announced their engagement in 1947.

After the couple's wedding in November of that year, he was named Duke of Edinburgh and left the military after his wife's accession to the throne in 1952. He officially became a British Prince in 1957.

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Prince Philip is survived by Queen Elizabeth II, and their children Charles, Prince of Wales, Prince Andrew, Princess Anne, and Prince Edward, as well as eight grandchildren, including Harry and Prince William.