According to The Daily Mirror, the card is addressed "To all the amazing NHS staff," and says, "Wishing you a very Happy Christmas and New Year."
It's believed the photograph was taken at the family's Norfolk home, Amner Hall, where Cambridge family relocated to amid COVID-19 lockdowns.
Earlier this week, William and Kate went on a three-day Royal Train Tour of the U.K., and on December 12, they took the kids to see a royal pantomime performance at London's Palladium Theatre.
The royal outing comes after the Duchess of Cambridge revealed in a new interview that she too has to deal with the odd "toddler tantrum."
In a video posted to the Kensington Royal Instagram page on November 28, the royal thanked those who had participated in the "5 Big Questions On The Under Fives"—a research survey into early childhood development—and even answered some questions about her involvement in the project, as well as her personal experiences as a mother-of-three.
When asked “how do you manage toddler tantrums in your household? Especially with multiple children,” Kate had the most relatable response.
She sighed, laughed, and replied: “Yes, that's a hard one. I'd also like to ask the experts myself.”
According to the experts, the best way to deal with a toddler tantrum is to calmy and gently put into words how the child might be feeling—which we're sure Kate has become quite the expert in.