Why Kate Middleton and Prince William could have a 'joint' birthday party this summer
Kate Middleton turns 40 this Sunday, but she may hold off on celebrating properly until summer


Prince William and Kate Middleton could host a 'joint' birthday party this summer, a royal expert has revealed.
- Kate Middleton is expected to have a 'joint birthday' with Prince William in the summertime, to properly celebrate her upcoming 40th.
- The Duchess of Cambridge turns the milestone age on Sunday, 9 January, but will be unable to mark the occasion with a bang due to rising Covid cases across the UK.
- In other royal news, Kate Middleton birthday heartbreak revealed—‘with that single decision, Kate's life was turned upside down’.
The Duchess of Cambridge will likely have a 'joint' party with Prince William in the summer, to make up for the 'scaled-down' celebrations planned for her 40th birthday this weekend.
Kate, who turns the milestone age on 9 January, is expected to have a small gathering with friends and family at home in Kensington Palace on Sunday in light of rising Covid cases across the UK. It's hoped that she will be able to properly mark the special occasion a little later in the year, when it's safer to do so.
“I think it will be lowkey this weekend," royal expert Ingrid Seward told the Royal Beat, before predicting that the festivities will be rescheduled for the summer. "Probably after the Platinum Jubilee celebrations are over—she and William, whose birthday is on June 21st, will have a joint party and really celebrate then.”
Prince William will mark his own 40th on the summer solstice, meaning there will be plenty of daylight hours for the couple to celebrate. With the Platinum Jubilee 2022 to mark the Queen's 70 years on the throne well behind them by that stage, they should also have a lot more time on their hands to plan.
As for Sunday's festivities, it's understood that Kate will keep the shindig as 'low-key' as possible. "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," royal author Duncan Larcombe said.
Like the rest of us, Kate is no stranger to having a pandemic birthday. The doting mother rang in her 39th in lockdown last year too, spending the day at home with her three kids and husband. She also took the opportunity to make a public statement, sending a sweet message on her social media to thank NHS frontline staff for their efforts over this challenging time.
Sign up for the woman&home newsletter
Sign up to our free daily email for the latest royal and entertainment news, interesting opinion, expert advice on styling and beauty trends, and no-nonsense guides to the health and wellness questions you want answered.

Hailing from the lovely city of Dublin, Emma mainly covers the Royal Family and the entertainment world, as well as the occasional health and wellness feature. Always up for a good conversation, she has a passion for interviewing everyone from A-list celebrities to the local GP - or just about anyone who will chat to her, really.
Emma holds an MA in International Journalism from City, University of London, and a BA in English Literature from Trinity College Dublin.
-
Kate Middleton's favourite Jo Malone perfume is the ideal fresh and citrusy scent for spring
If you're looking for a new spring scent, it doesn't get much better than Kate Middleton's citrusy go-to, Jo Malone's London Orange Blossom Cologne
-
On the fence about pink? Duchess Sophie's clever styling proves this pretty summer colour can work for anyone
Duchess Sophie's pink midi skirt is a great way of adding color for the summer, without it being too much
-
Kate Middleton's sad four-word admission after Princess Lilibet's birth
Princess Lilibet just marked her fourth birthday - and it may have been a reminder of sadness for Kate and William
-
Kate Middleton's favourite flats are trending again in 2025 - I predict she'll wear them again soon
Boat shoes are set to be a hot trend in summer 2025, and the Princess of Wales has been a fan for a long time
-
Prince William will have an unexpected sidekick for an important first - and it’s not Princess Catherine
The Prince of Wales is set to team up with another family member
-
Kate Middleton's 'commitment to self-improvement' has helped her balance royal and family life, royal expert says
The Princess of Wales has a 'regimented daily routine' that helps her divide and manage her time, a royal expert has said
-
Prince Louis' loud hobby is the hilarious reason Prince William spends his life with 'his fingers in his ears'
The royal youngster is learning a particularly 'noisy' skill, Prince William revealed
-
Prince William jokes he has to enjoy thoughtful gift before George, Charlotte and Louis 'get their hands on it'
The Prince of Wales paid a visit to the Duchy of Cornwall and was given a homemade product Prince George is apparently 'obsessed' with.
-
Prince William 'spends his life' cleaning up at Adelaide Cottage - but it's not after who you might think
Prince William revealed that he's left cleaning up after certain family members at Adelaide Cottage
-
Prince George 'absolutely loves' this unusual hobby - and he's following in his parents footsteps
Prince George is a huge fan of a hobby that Prince William and Kate Middleton also love