LONDON (NewsNation Now) —  Prince Philip, husband of Queen Elizabeth and a key figure in the British royal family for almost seven decades, has died at 99, Buckingham Palace said on Friday.

Buckingham Palace said Friday it is welcoming messages of condolence for the passing of Prince Philip. A website has been created in his honor and supporters can send their thoughts to the Queen and Royal Family.

According to its website, a selection of messages will be “passed onto members of the Royal Family, and may be held in the Royal Archives for posterity.”

Prime Minister Boris Johnson said Prince Philip, “earned the affection of generations here in Britain, across the Commonwealth and around the world.”

“We are a kingdom united both in grief and in gratitude,” Johnson said. “Grief at Prince Philip’s passing, and gratitude for his decades of selfless service to the country.”

U.S. President Joe Biden also sent his condolences to the Royal family “on behalf of the people of the United States.”

Over the course of his 99-year life, he saw our world change dramatically and repeatedly. 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. The impact of his decades of devoted public service is evident in the worthy causes he lifted up as patron, in the environmental efforts he championed, in the members of the Armed Forces that he supported, in the young people he inspired, and so much more. His legacy will live on not only through his family, but in all the charitable endeavors he shaped. Jill and I are keeping the Queen and Prince Philip’s children, grandchildren, and great-grandchildren in our hearts during this time.

President Joe Biden

Philip, who served in the Royal Navy during World War II, married the future queen in 1947 and worked until his retirement in 2017. Philip spent a month in hospital earlier this year for an undisclosed infection and a heart problem before being released on March 16 to return to Windsor Castle.

Philip is survived by the queen and their four children, Prince Charles, Princess Anne, Prince Andrew and Prince Edward, as well as eight grandchildren and nine great-grandchildren.

You can send your message of condolences on the passing of Prince Philip, here.