Just like millions of families around the world, each year, the British royal family gathers to celebrate the holidays. Fans of Queen Elizabeth II, Meghan Markle, and Kate Middleton may assume that the festivities are formal in nature, but a new documentary sheds some light on the laid-back approach that the famous family takes when it comes to their Christmas celebrations.

According to the Daily Mail, a new Channel 5 documentary called "Sandringham: The Queen at Christmas," gave viewers an inside look at what goes on behind closed doors.

Per the publication, the members of the family arrive at the estate on Christmas Eve. At that time, Prince Philip begins the celebrations with a drink reception at 7:30 p.m. As for the strength of the beverages, royal expert Ingrid Seward revealed that they are, in fact, "very strong." 

"I think the Queen likes a martini, other people would rather have champagne," she said, adding, "Prince Philip isn't a great drinker, he always used to drink pale ale."

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Aside from the offered drinks, the outlet stated that the royals take part in the German tradition of exchanging gifts on Christmas Eve. As for what the gifts the monarch, Duchess of Cambridge, and Duke of Sussex have given and received during the holiday season, the new doc shared that the "jokier the better." 

Reportedly, Her Majesty reportedly once received a "Big Mouth Billie Bass," which is a humorous fake fish that hangs on a wall. Additionally, the Duchess of Cambridge is said to have gifted Prince Harry a "grow your own girlfriend" kit prior to meeting Meghan Markle. 

The events also include games, such as charades. However, according to royal author Claudia Joseph, some games are off-limits due to the extreme competition that they bring. This is why Prince Andrew once said that Monopoly was "too vicious" for any of them to play at the gatherings. 

This is not the only instance when the royal family has celebrated a special occasion in a low-key way. Earlier this year, Meghan Markle ordered her own birthday cake from Luminary Bakery, which is a local establishment that helps empower women. Additionally, it has been reported that the Duchess found makeup inspiration for her May 2018 royal wedding to Prince Harry in a place that is familiar to many.

Prince William, Prince Harry, Meghan Markle and Kate Middleton Pictured [L-R]: The Duke of Cambridge, Duke of Sussex, Duchess of Sussex and Duchess of Cambridge arrive at Westminster Abbey to attend a service to mark the centenary of the Armistice on Nov. 11, 2018 in central London. Photo: Paul Grover/AFP/Getty Images