New details about Prince Philip, who turns 99 on Wednesday, are coming to light as a royal expert is speaking out to say that he is not a “conventional lovey-dovey husband.” However, the expert added that Philip has been comforting the Queen, 94, during their time in lockdown with his “naughty” sense of humor.

Joe Little, managing editor of Majesty Magazine, told Hello! magazine that one “silver lining” about being in quarantine amidst the coronavirus pandemic has been that Philip and the Queen have gotten to spend more time together than ever. He added that Philip will be supporting the Queen “morally” in the same way that he always has.

“He is such an important ingredient in her success and happiness. He makes her laugh, he’s got a slightly naughty sense of humour, a sense of the ridiculous that keeps her amused,” he said. “She will value that companionship much more than if he were at the other end of a telephone.”

Phil Dampier, who wrote the book “Prince Philip: Wise words and Golden Gaffes,” said that Philip has “always had the ability to make [Her Majesty] laugh.” Little then added that Philip has been a “great comfort” to the “very social” Queen, who has struggled with being cut off from the rest of the world during this difficult time.

“They clearly have the most enormously strong partnership and I think a lot of the strength in the relationship comes from his independent mind,” he said. “He’s not your conventional lovey-dovey husband. He’s always been bracing and supportive to the Queen.”

Royal biographer Robert Lacey chimed in to say that both Philip and the Queen have enjoyed video-calling their children, grandchildren and great-grandchildren, with “gadget man” Philip “reveling” in it. He went on to say that Philip, who he says has always been “suspicious of fuss,” will prefer to keep his birthday low-key.

Finally, royal expert Richard Fitzwilliams opened up further about the low-key birthday celebration that Philip has planned.

“Prince Philip has always been famed for disliking being fussed over,” he told the U.K. Express. “When he turns 99 on Wednesday it will be no different, though he would, one feels, appreciate some form of celebration when he turns 100 next year. That is something for us all to look forward to.”