Donald Trump, the former US president, mourned the death of Prince Philip on Friday and said it was an “irreplaceable” loss to Britain.

Along with his wife Melania, Trump expressed his “heartfelt sympathies” to Queen Elizabeth II and the royal family.

“The world mourns the passing of Prince Philip, a man who embodied the noble soul and proud spirit of the United Kingdom and the Commonwealth,” Trump said in a statement, AFP reported.

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“This is an irreplaceable loss for Great Britain, and for all who hold dear our civilization,” he said.

“Prince Philip defined British dignity and grace. He personified the quiet reserve, stern fortitude, and unbending integrity of the United Kingdom,” he said.

Earlier, President Joe Biden paid tribute to Prince Philip, who died Friday at age 99, as a selfless servant of Britain and its people.

“From his service during World War II, to his 73 years alongside the Queen, and his entire life in the public eye — Prince Philip gladly dedicated himself to the people of the UK, the Commonwealth, and to his family,” Biden said in a statement.

Later, Biden also took to Twitter to expressing his condolences to the Royal family. “Jill (Biden) and I are keeping the Queen and Prince Philip’s children, grandchildren, great-grandchildren, and the people of the United Kingdom in our hearts during this time.”

On Facebook, former president Barack Obama praised Philip as someone who took his job as husband to the queen with selflessness.

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“At the queen’s side or trailing the customary two steps behind, Prince Philip showed the world what it meant to be a supportive husband to a powerful woman.”

Recalling his and wife Michelle Obama’s first meeting with the British royal couple, he said Philip “in particular was kind and warm, with a sharp wit and unfailing good humour.”

“We will miss him dearly,” Obama wrote.