Princess Eugenie and her husband Jack Brooksbank are expecting their second child.
In a statement, Buckingham Palace said: "Princess Eugenie and Mr Jack Brooksbank are pleased to announce they are expecting their second child this summer.
"The family are delighted and August is very much looking forward to being a big brother."
The couple had their first child, August, in February last year, after getting married in October 2018 at Windsor Castle in front of 850 guests.
Announcing the news on her personal Instagram account, Eugenie shared a sweet photo of young son August kissing her bump to announce the news.
In the photograph, taken by Mr Brooksbank, Eugenie, dressed in a woolly hat, beams as August, in a burgundy winter hat, matching trousers and wellies, embraces her and kisses her bump, as they stand next to a fence in a leaf-strewn field.
Eugenie wrote: "We’re so excited to share that there will be a new addition to our family this summer.”
It'll be Prince Andrew's and the Duchess of York's third grandchild. As well as August, they are also grandparents to Princess Beatrice's young daughter Sienna, who was born in September 2021.
The happy news has brought joy to the Windsors in the wake of the late Queen’s death and amid difficult times following the publication of the Duke of Sussex’s controversial tell-all memoir.
He or she will be the first of the Queen’s great-grandchildren to be born since her death, and will arrive in the King’s coronation year.
August Philip Hawke Brooksbank was born at the exclusive Portland Hospital in central London on February 9 2021.
He made an appearance at the Platinum Jubilee pageant celebrations last year wearing a union flag jumper as Eugenie bounced him up and down on her knee as they sat in the royal box.
He was christened alongside Mike and Zara Tindall’s son Lucas Philip in a rare royal double christening at Windsor.
The occasion marked the first time in modern history there has been a double royal christening in the UK - and saw the late Queen make an appearance after a month 'resting' on doctor's orders.
In Denmark, the Crown Prince’s twins: Prince Vincent and Princess Josephine, were christened together in 2011.
While paying tribute to the late Queen, Eugenie poignantly wrote about her hopes that her son would inherit some of her talents.
She wrote: "I think of my grannie and what she has stood for, for so many people and for our family, during these 70 years. I’d love Augie to have her patience, her calmness and her kindness, while always being able to laugh at himself and keep a twinkle in his eye”