Among more than 600 comments, some of which were from fans complaining that the photo was a “waste of time” because they couldn’t see Sienna’s face, Huang wrote: “Happy birthday Cece”, alongside red heart emojis, revealing the little girl’s nickname.
The only other image which has come close to revealing “Cece’s” face is a photo shared by her aunt, Princess Eugenie, of the little royal with her cousin, August, at London Zoo.
Born on September 18. Sienna is 10th in line to the British throne, however she does not hold a royal title.
According to the Daily Mail, only grandchildren of the monarch through the male line are bestowed a title - hence why Prince Harry’s children Archie and Lilibet can tack on “Prince” and “Princess” to their names.
However, through her father, descended from Italian nobility, Sienna does inherit the title of “Nobile Donna”. She will also eventually inherit the family’s seat, the 18th-century Villa Mapelli Mozzi palace in northern Italy, reports the Daily Mail.
Sienna’s name has special meaning for the family.
The princess is understood to have chosen a name starting with “S” as a nod to her mother, Sarah Ferguson, and to acknowledge the colour of the child’s hair being like her mother and grandmother’s.
A source told Hello! magazine: “They were looking for an Italian name which started with an S for Sarah, to honour the Duchess, and also reflected the golden rust colour of both the Duchess’ hair colour and Beatrice’s which the new baby shares.”