Kate Middleton has an infectious laughter.

The Duchess of Cambridge is one of the most beautiful royals and many are captivated by her smile. One netizen took to Quora and asked about the most interesting facts about Prince William’s wife. One online user said that it’s Middleton’s “infectious laughter” and went on sharing various photos of the duchess laughing.

“Whenever I think about Catherine, the first thing that comes to mind is this wild and free beautiful woman, laughing out loud with wind in her hair. Wind seems to love Catherine,” Corina Okechukwu, a teacher, wrote.

She also pointed out how the future king tries to keep his face straight whenever Middleton laughs. According to her, Prince William’s reaction to his wife’s laugh is “absolutely heartwarming.“

“She looks like a proper child when she throws her head backwards and starts laughing. Inevitably, everyone around her starts laughing and who could blame them? Just looking at her pictures is enough to make one smile. Infectious happiness!” Okechukwu added.

Earlier this month, Middleton visited the Aga Khan Centre in King’s Cross, London. The duchess was stunning in her teal cocktail dress by ARoss Girl. She paired her beautiful gown with green high heels.

It was very windy and Middleton was photographed with the wind blowing her hair up. The duchess smiled and kept her composure while Prince William stood beside her talking to someone else.

Just like Middleton’s smile, many fell in love with her hair because even if the wind blows it, the duchess still looks so beautiful. One even said that she was jealous of Middleton’s hair problems.

As for Middleton’s infectious smile, according to royal biographer Katie Nicholl, there was a backstory behind it. The duchess’ favorite teacher Dr. Robert Acheson, former headmaster of St. Andrews’ Prep School, was reportedly the one who inspired her to keep smiling.

“When Dr. and Mrs. Acheson left the school, Kate presented them with a teddy bear that everyone in the family had signed. She had carefully inscribed it with the words that Dr. Acheson had instilled in her: ‘I’ll always keep smiling,’” Nicholl wrote.

Dr. Acheson said that Middleton had the most fabulous smile and whenever they met he would always remind her to keep smiling which explains the significance of the statement written on the note.

Kate Middleton
Kate Middleton visits The Foundling Museum on March 19, 2019 in London. Getty Images/Eddie Mulholland