Little Prince Louis looks so grown-up in exclusive royal photo just released as a Christmas card

The Duke and Duchess of Cambridge have finally taken an official portrait and showed the world little Prince Louis.

In a Twitter post from Kensington Palace, the family of five posed for a Christmas card this year and it was filled with cuteness. The photo is found below.

Baby Prince Louis, seven months, took the cake with his big smile and tiny beaming eyes. He sat in mother Kate Middleton's arms for the shot.

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Prince George, five, also brought the cuteness factor as he posed in a green sweater wearing trousers and black welly boots. He grinned at the camera as he held onto his dad's shoulders with one leg up.

Little Princess Charlotte also brought the look to the table. The determined three-year-old stared directly at the camera wearing a cheeky smile. She wore a navy sweater with a matching denim skirt.

The oldest of the three, George certainly looked to be growing quickly as time goes by. His blue trousers reflected his age in comparison to Louis who spotted tights beneath his shorts.

The move is a royal tradition in which bare legs give off a "suburban" feel. The boys only switch to trousers later on in life, for George it looks to be at five years old.

Kate Middleton and Prince Harry were both donned in dark blue jeans for the portrait. Middleton, 36, paired hers with a light brown sweater while Harry wore a blue plaid shirt.

In the caption, the palace noted the location and photographer for the picture:

The caption began:

"The Duke and Duchess of Cambridge are pleased to share a new photograph of their family."

It continued:

"The photograph, taken by Matt Porteous, shows The Duke and Duchess with their three children at Anmer Hall, and features on Their Royal Highnesses' Christmas card this year."

The family will join other royals and their extended family for a pre-Christmas lunch next week at the Buckingham Palace. Thereafter, they are set to go to Sandringham House in Norfolk for Christmas Eve and Christmas Day.

Like any other family, the young ones are eagerly anticipating the gift-giving season as it nears. But it's not just Prince George, Princess Charlotte, or little Prince Louis that will receive tons of gifts.

On the list of adorable royals are also Princess Gabriella of Monaco, Prince Nicholas of Sweden, Prince Jacques of Monaco, and Princess Leonore of Sweden.

Additionally, royal fans are hoping that they'll get another chance to see Prince George's new wave before the holidays. Middleton mentioned the practice he's putting in during an interview in Cyprus last week.

After her official opening of the Oasis recreation center, Middleton spoke to Rhian Davis. Davis, who has her own seven-month-old daughter, said:

"She asked whether she was sleeping through the night, and she told me that Louis is starting to wave."

William also joined Middleton and the two showed support for military and their families. They gifted presents and interacted with several persons who couldn't spend the season with their loved ones.