Royal Family
Prince William celebrated Kate Middleton's birthday away from her and their kids. Pictured: Royal family after his christening service at the Chapel Royal, St James's Palace, London on July 9, 2018. Getty Images/Dominic Lipinski/AFP

Prince William recently made a joke about Kate Middleton on the Duchess of Cambridge’s 37th birthday.

The Duke of Cambridge didn’t spend the entire day with his wife because he had a royal engagement for the London Air Ambulance. While there, two children presented the future king with a handmade card to give to his wife. Prince William praised the children for remembering his wife’s special day.

But the dad of three also uttered a hilarious remark and said that he did remember his wife’s birthday that morning and that was enough.

The beautifully designed card was filled with colors and touching messages. The children even referred to the mom of three as a princess in one of the greeting cards.

Meanwhile, Middleton wasn’t the only family member that Prince William remembered during this week’s outing. While celebrating the 30th anniversary of the London Air Ambulance, the Duke of Cambridge, who has been named patron, told the crowds that Prince George is expecting a very special present from his dad when he returns home.

“I can’t go back without a helicopter for George, I’d be in trouble,” he said.

Luckily for Prince William, the members of the London Air Ambulance already had the toy helicopter ready for Prince George. The eldest son of Prince William and Middleton is obsessed with helicopters.

During his trip to Germany in 2017, the third in line to the throne was treated with a helicopter tour. Prince George had the chance to ride a Eurocopter EC145, wear a helmet, and be strapped on the pilot’s seat while on tour.

Prince George’s passion for aircraft may have been inherited from Prince William’s love for helicopters. On the morning of his engagement, he was spotted flying over the skies of London. Prince William also worked as an RAF pilot between 2009 and 2013.

He also served as an air ambulance pilot between 2014 and 2017 when he worked at the East Anglian Air Ambulance. However, the dad of three decided to retire from his post so that he could focus more on his royal duties.