Formal:
* Petite princesse: This is the most literal translation and is suitable for formal occasions.
Informal:
* Petite puce: This translates to "little flea" and is a cute and affectionate term for a little girl.
* Ma petite princesse: This translates to "my little princess" and is a very endearing way to refer to a daughter or niece.
* Petite chérie: This translates to "little darling" and is another affectionate term.
Other options:
* Princesse miniature: This is a more playful and descriptive way to say "little princess."
The best option will depend on the specific situation and your relationship with the person you are talking to.