An important birthday is coming up for Duchess Kate. This Sunday, she turns 40 years old!

This year, there are many restrictions due to the coronavirus. Kate and her husband Prince William remain cautious and don't want to take chances. Here's how the Duchess will spend her birthday.

Duchess Kate's 40th birthday party will be small and intimate

Duchess Kate celebrates her birthday on Jan. 9. According to the Daily Mail, her party will take place in a small group, like at Christmas, due to COVID-19.

Instead of a big event, Kate only plans to get together with her closest friends and family. Like everyone else, the royals must adapt to pandemic restrictions.

A source revealed to the British newspaper: "There are likely to be low-key celebrations for the Duchess.

"She didn't want anything flashy anyway – that's not exactly her thing – but particularly given the current climate anything is likely to be scaled down."

Kate's 40th isn't the only royal event affected by the recent surge of the new Omicron variant of COVID-19.

Queen Elizabeth II was also forced to cancel many Christmas traditions last month. With the spread of Omicron, only a small Christmas dinner was held at Windsor Castle.

Kate's family, on the other hand, was welcomed by the Cambridges at Anmer Hall in Norfolk.

The rest of the Royal Family celebrated separately from William and Kate—who will mark her 40th birthday without a grand party.