Princess Beatrice, 35, has a two-year-old daughter with her husband Edoardo Mapelli Mozzi.
The couple, who married three years ago, are reportedly planning on growing their family now that Sienna Mapelli Mozzi is at a good age.
Sienna was born on September 18, 2021, and the royal tot is now 10th in line to the throne.
Sources close to the family have claimed the Princess and her husband are keen to have a second child soon, so that Sienna will have a sibling close to her age.
Princess Beatrice and Edoardo at the Coronation with Prince Harry
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A source told OK!: “Beatrice wants another little one then she will consider her family complete.
“She’s been telling friends for quite some time now that it is the right time to add to her family and she wants to do it soon so that her children are all close in age.”
Edoardo, 39, already has a seven-year-old son from his previous relationship with Dara Huang, named Christopher Wolf - nicknamed Wolfie.
“Edo has a son and a daughter now and is very happy, but he’s keen to add to his brood one more time," the source claimed.
Princess Beatrice and Edoardo married in 2020
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Princess Beatrice and Edoardo may want to begin growing their family
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“Beatrice considers Wolfie one of the family and she treats him like her own, but she also thinks it’s important that she and Edo have another baby before it’s too late.”
If the Princess of York has a second child, they will become 11th in line to the throne after their older sister.
On Monday, Edoardo took to Instagram to celebrate Sienna's second birthday, captioning the post: "Happy Birthday Baby Girl. You bring us so much love and joy every day."
The photo showed the two-year-old looking away from the camera, wearing a red and white floral dress and a wide-brimmed straw hat.
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Princess Beatrice and Edoardo at Vogue World
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Sienna was born at the Chelsea and Westminster Hospital in Chelsea.
The birth took place just over a year after Beatrice and Edo got married at the Royal Chapel of All Saints in Windsor in July 2020.
The couple got engaged in September 2019, and planned to have a wedding in May 2021 - but it was postponed due to the coronavirus pandemic.
Princess Beatrice, although not a working royal, acts as Counsellor of State and has even been nicknamed King Charles's "secret weapon" during the ongoing rifts in the Royal Family.