A royal source tells ET the Duke and Duchess of Sussex didn't intentionally miss out on the bash.
The Duchess of Cambridge's 37th birthday is on Wednesday.
ET brings you a preview of all the regal things the royal family has coming up in 2019.
The royal couple greeted fans in Sandringham, England.
The Fab Four are reflecting on an eventful year.
The group seems to have squashed any tension for the holiday.
It’s been a year of celebration for the royal family.
A source tells ET the 3-year-old royal is taking private lessons in South London.
ET takes a look at all the biggest show-stopping moments to come out of Britain in 2018!
From royal weddings and babies to surprising splits, rehab stints and TV scandals, there wasn't a dull moment in 2018!
The holiday event comes amid rumors of tension between the royals.
ET brings you an inside look at everything involved in a typical royal Christmas celebration.
On Friday, Kensington Palace released the precious photo of Kate and William with their three children, Prince George, Princess Charlot
The Duke and Duchess of Sussex shared a previously unseen photo from their May wedding reception for their holiday card.
