Kate Middleton reportedly made the cheeky comment during Prince William’s graduation from Sandhurst Military Academy in December 2006

Members of the royal family often wear military uniforms while on duty.

And it looks like the Duchess of Cambridge is a big fan of when her husband, Prince William, is due to wear it.

That’s because a reader claimed she once said she found William “sexy” when he put on formal attire.

Kate was reportedly caught expressing her love for the uniform as she attended William’s graduation ceremony at Sandhurst Military Academy in 2006, four years before their wedding.

She attended the ceremony with her parents Carole and Michael Middleton, along with members of the Royal Family including the Queen to watch William on his big day.

Kate looked like the perfect potential royal, wearing a red coat with black boots and a matching hat.

And years after the celebrations, a reader revealed that she whispered something we wouldn’t expect to hear from a member of The Firm.

They told True Royalty documentary Royal Wives that she said, “I love him in uniform, he’s so, so sexy.”

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Graduation was a big day for Kate and William, and a royal expert claims that was the moment she realized they would eventually get married.

Journalist Rebecca English told Channel 5 documentary William & Kate: Too Good To Be True: “We didn’t expect Kate and her family to show up, and myself and a number of photographers and reporters. were all standing together at a press booth.

“Suddenly, out of the corner of our eye, we saw Kate, her mom and dad being dragged past the seats.

“I remember turning to the person next to me and telling them that was it, it was done. This woman is going to be our future queen.”

However, a few months later the couple shocked everyone when they broke up. Fortunately, the separation only lasted weeks and they soon got back together.

Three years later William finally knelt down and proposed to Kate while on vacation in Africa and they told the world three weeks later in November 2010.

They tied the knot in a grand ceremony at Westminster Abbey in April 2011 – and earlier this year they celebrated their 10th wedding anniversary.

Now it has been claimed the couple have been given a “higher role” in the royal family due to their popularity.

William and Kate are expected to return to royal duties later this week after spending the summer vacation with their children – Prince George, Princess Charlotte and Prince Louis.

And with the Queen, 95, appearing to reduce the number of engagements in her diary, William and Kate are stepping up, according to Andrew Lownie, the author of several historical books on the royal family.

He told the Express: “We are in a period of what can be called a gentle regency, indeed the queen is in retreat, not doing a lot of roles.

“The roles she plays are accompanied by Prince Charles, everyone is getting ready for Charles and Camilla.

“As a result, William and Kate, who seem to be very popular, take Charles and Camilla’s place.

“Because they’re, I’d say almost more popular than Charles and Camilla, they’ve probably been given a higher role.”