Kate Middleton’s toned legs could be due to several reasons and here’s how you can also achieve them.

Earlier this week, the Duchess of Cambridge made headlines after she accidentally exposed her thighs, which Prince Harry reportedly used to describe as “killer legs.” Middleton visited Bletchley Park to view a special D-Day exhibition when a gust of wind caught her dress, causing her to flash her toned legs.

According to Becky Pemberton, among the reasons for Middleton’s toned legs is genetics. In addition, her fit and active lifestyle may have also contributed to it.

An insider said that Prince William’s wife is an “exercise junkie.” Middleton and her sister Pippa take their toned physiques “extremely seriously.” The two have spent time working out at Middleton’s home, Kensington Palace.

“They worked hard in the gym at Kensington Palace, starting with cardio warm-ups, hip raises, diagonal and reverse lunges, stomach crunches, squats, calf raises, bridges and push-ups,” the royal source said.

Middleton also loves to run after her kids. In 2016, the Duke and Duchess of Cambridge visited India. The royal mom of three told Professor Bulbul Dhar-James that the secret to her fast weight loss after her pregnancies was “running after my kids.”

For those who want to achieve Middleton’s killer legs, Cosmopolitan shared the following workout to achieve sexy and toned thighs.

Squat Kicks

Start in a squat position, rise up and kick your legs straight out to the side at hip level with your leg. Return to the squat position and do with the opposite leg. Do 15 on each side.

180 Squat Jumps

From a squat position, jump up and twist 180 degrees in the air so you land (in a squat) facing the opposite direction. Repeat for 30 seconds.

Toe Touch Lunge

Stand with your feet hip-width apart with your arms at your sides. Lunge back with your right leg, keeping your chest lifted, pressing into your left heel. Reach your fingertips toward your left heel. Then reach your fingertips toward your left toes and bend your left knee 90 degrees. Hold for one second and return to your starting position. Do 10 reps, switch sides and repeat.

Kate Middleton
Kate Middleton arrives to launch a new national support line at the charity Family Action on Jan. 22, 2019 in Lewisham, England.  Getty Images/Adrian Dennis