Princess Beatrice's daughter Sienna Mapelli Mozzi has an adorable nickname, which was shared on social media by her father's previous partner.
Edoardo Mapelli Mozzi was formerly in a relationship with architect Dara Huang, whom he shares a seven-year-old son with named Wolfie (Christopher Woolf).
Huang shared Sienna's nickname in a comment on Edoardo's birthday tribute to his daughter.
The 39-year-old shared a sweet picture of his daughter on Instagram to mark her second birthday.
Beatrice and Edoardo share a two year old daughter
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He wrote: "Happy birthday baby girl. You bring us so much love and joy every day."
Commenting on the image, Huang wrote: "Happy birthday Cece."
Sienna was pictured walking barefoot while wearing a sombrero, and a red floral patterned long-sleeved dress.
Beatrice and Edoardo keep their daughter strictly private, therefore she faced away from the camera.
Princess Beatrice and Edoardo keep Sienna strictly private
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Sienna, who turned two on September 18, is currently 10th in line to the throne.
The first time Sienna was seen by the public was when her aunt, Princess Eugenie, shared a photo of the young girl and her cousin, August, at the London Zoo's penguin exhibit earlier this year.
August is Eugenie's eldest son, whom she shares with Jack Brooksbank.
Sienna was born on September 18, 2021, at 11.42pm at the Chelsea and Westminster Hospital in London, weighing six pounds and two ounces.
Edoardo and his ex Dara share a seven year old son Wolfie
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Princess Beatrice and Edoardo had Sienna in 2021
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The name Sienna was chosen, perhaps due to Edoardo's Italian ancestry.
It could also relate to Beatrice's mother, the Duchess of York's fiery hair, as the name's meaning is "orange-red".
Beatrice chose to honour her late grandmother Queen Elizabeth II by adding Elizabeth to Sienna's name.
Despite the fact that Beatrice is a princess, Sienna, the late Queen's great-granddaughter, does not hold a royal title.