Prince Philip has been staying in Sandringham since his retirement in 2017. Following his official departure from the British Monarchy, he has reportedly focused on his personal passions in the Norfolk estate.

But, amid the pandemic crisis, he and Queen Elizabeth II relocated to Windsor Castle. These days, it has seemingly appeared that they are enjoying their time as they self-isolate together.

The Duke of Edinburgh reportedly celebrated a new and important milestone in his life earlier this month. Although he is with his wife, some are certain that both the royal couple misses their family members, who are also self-isolating in their respective royal residences.

Despite this, though, Prince Philip and Queen Elizabeth II still reportedly continue to communicate with their family, especially their grandchildren and great-grandkids. To date, the royal couple has a total of eight grandchildren. But, it is said that both of them have their own "favorite."

For the Duke of Edinburgh, many have concluded that his favorite is Prince William, according to the Daily Express. But, to the surprise of the many royal fans, reports said that it is not the Duke of Cambridge. Rather, his favorite is reportedly Lady Louise Windsor, who is their youngest grandchild.

Lady Louise is the 16-year-old daughter of Prince Edward and Sophie, the Countess of Wessex. As noted, she stands at the 13th spot at the line of succession. 

Royal experts reportedly said that Prince Philip favors her the most because she "spends much time" with him and Queen Elizabeth II, especially when they are in Balmoral, in Scotland. It is also said that the young royal normally spends most of her summer with her grandparents.

Lady Louise also reportedly shares the same interests as her grandfather. One great example of this is their "love" for "carriage riding," as per claims.

Cheat Sheet also claimed the same. In fact, the publication said that the Duke of Edinburgh still attends his granddaughter's competitions despite his "advanced" age. 

Just like Prince Philip, his wife, the Queen also reportedly has her favorite. As stated, some are certain that the British Monarch favors Prince Harry the most. But, royal experts said that this is not the case.

The same publication shared that Queen Elizabeth II's favorite grandchild is Peter Phillips. He is Princess Anne's son, who is one in only two of her grandchildren who do not have royal titles. The press has repeatedly dubbed him as the Monarch's favorite due to their "tight" relationship.