Princess Eugenie causes fan frenzy with rare pictures of son August as she celebrates milestone

Princess Eugenie caused a fan frenzy with rare pictures of her son August as she celebrated her husband's birthday.

The Princess of York, 34, took to Instagram with three previously unseen pictures of her family life.

In 2018, Eugenie tied the knot with businessman Jack Brooksbank, with whom she shares two sons, August, three, and Ernest, who will turn one later this month.

Today was Brooksbank's 38th birthday, and Princess Eugenie took to Instagram to celebrate.

Princess Eugenie

She captioned the post: "Happy Happy Birthday my love.

"Always making joy wherever you are."

The princess included three photographs of her family, including one of her rarely-seen three-year-old son.

The picture showed August playing with his father at the beach.

August Brooksbank and Jack Brooksbank

The second and third photographs showed Princess Eugenie posing with Jack in various settings.

Royal fans commented underneath the post with messages like: "Happy birthday Jack."

Another said: "Happy birthday Jack. You two are one of the cutest couples.

"Hope you all have a wonderful day celebrating with your sweet family."

Princess Eugenie

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Princess Eugenie

Meanwhile, several fans compared the young boy to his second cousin, Prince Archie, who turns five next week.

One said: "August looks so much like Archie."

Another wrote: "He’s a sweet little boy and so is Archie."

A third commented: "Happy birthday. Your son looks like Meghan and Harry's son."