Prince Harry and Prince William shared personal tributes on Monday to their grandfather Prince Philip, who died Friday at the age of 99. The Duke of Sussex called Philip “a man of service, honor and great humor” in a statement.

“He was authentically himself, with a seriously sharp wit, and could hold the attention of any room due to his charm—and also because you never knew what he might say next.”

Though Harry acknowledged that many will remember Philip for his legacy as “the longest resigning consort to the Monarch,” he wrote that he will remember his grandfather as much more than that.

“To me, like many of you who have lost a loved one or grandparent over the pain of this past year, he was my grandpa: master of the barbecue, legend of banter, and cheeky right ‘til the end,” he wrote.

He concluded his message by thanking Philip for his “dedication to Granny, and for always being yourself.

“You will be sorely missed, but always remembered—by the nation and the world. Meghan, Archie, and I (as well as your future great-granddaughter) will always hold a special place for you in our hearts.”

Prince William also commemorated his late grandfather on Monday, whose “century of life was defined by service – to his country and Commonwealth, to his wife and Queen, and to our family.

“I feel lucky to have not just had his example to guide me, but his enduring presence well into my own adult life – both through good times and the hardest days,” William wrote. “I will always be grateful that my wife had so many years to get to know my grandfather and for the kindness he showed her.”

William also shared a photo of his son Prince George alongside Prince Philip, both dressed in blue.

Prince Philip’s final moments were “very, very peaceful,” his daughter-in-law Countess Sophie of Wessex told reporters Sunday.

“It was right for him. It was so gentle,” added Sophie, 56, the wife of Philip’s youngest son, Prince Edward. “It was just like somebody took him by the hand and off he went. Very, very peaceful. And that’s all you want for somebody isn’t it?”

Philip, 99, died Friday at Windsor Castle and left what the 94-year-old Queen Elizabeth II described as “a huge void in her life,” said her son Prince Andrew, the third of the couple’s four children. “We’ve lost, almost, the grandfather of the nation.”

Philip’s funeral will take place April 17 at Windsor Castle, where the prince lived out his final weeks with the Queen. Only 30 people are allowed to attend the smaller service at St. George’s Chapel under current COVID-19 restrictions in England, but it will be broadcast live. The prince will be interred at the royal vault in the chapel, according to the palace.

His grandson Prince Harry, who lives in California since stepping away from royal duties last year, will attend the service along with other members of the royal family, palace officials have said. His wife, Duchess Meghan, is pregnant with their second child and has been advised by her doctor not to make the journey.

Philip’s death comes a month after the couple’s bombshell televised interview with Oprah Winfrey, in which they opened up about their reasons for stepping back from royal duties and moving to America in search of more independence and privacy.

Royal family members said they appreciated the outpouring of good wishes from people across Britain and around the world to Philip, who was the queen’s consort and support through more than seven decades of marriage.

Palace and government officials have discouraged well-wishers from paying their respects in person amid the coronavirus pandemic. But hundreds of people on Sunday brought notes, cards and flowers to the gates of Windsor Castle, while others laid tributes outside Buckingham Palace.

Prince William and Duchess Kate, as well as Prince Harry and Duchess Meghan, posted tributes to Philip on social media.