Kate Middleton and Prince William reportedly made a huge mistake when they introduced Prince George to the public. The third in line to the throne was seen just hours after he was born.

After Kate gave birth to her eldest child at St. Mary’s Hospital’s Lindo Wing, she and Prince William posed on the steps of the facility to show Prince George to the world. After a few minutes, the Duke of Cambridge escorted his wife to the car.

Photos and videos showed Prince George swaddled in a blanket before he was buckled into his car seat. However, swaddles and blankets usually prevent the car seat straps from staying in the correct position.

Child Car Seats states that seat belts should be worn as tightly as possible so that only one to two fingers can fit between the child’s chest and harness. After seeing Prince William and Kate’s mistake in 2013, a police agency in Grampian, Scotland, reminded parents on how to properly use car seats.

“They may not be third in line to the throne, but you need to make sure that your little prince or princess is sitting in the correct car seat when traveling in your carriage or family car,” the reminder stated. “It’s important to remember that even in a minor crash, unrestrained children can be thrown about inside the vehicle, injuring themselves and others,” the reminder added.

Two years after Prince George’s birth, Prince William and Kate welcomed their second child, Princess Charlotte. In 2015, it was evident that the Duke and Duchess of Cambridge were more confident in fitting their daughter into her car seat.

And by the time Prince Louis was born, the royal couple has already perfected the use of a car seat. Their youngest child just celebrated his first birthday last week. There are rumors that the couple could announce Kate’s fourth pregnancy next year.

In related news, Kate usually travels with packed snacks when she’s out with her three children. Doing so ensures that her three kids won’t feel hungry, especially during long road trips or flights.

Kate Middleton and Prince William Catherine, Duchess of Cambridge, and Prince William, Duke of Cambridge, attend the traditional Easter Sunday church service at St George's Chapel, Windsor Castle, on April 21, 2019. Max Mumby/Indigo/Getty Images