Formal:
* Petits anges: This is the most literal translation and is quite formal.
* Petits chérubins: This is a more poetic option, literally meaning "little cherubs".
Informal:
* Petits anges: This can also be used informally, but you might want to add a bit more context.
* Petits bouts de chou: This is a very common and endearing expression for "little darlings" or "little lovelies" and is often used for children.
* Mignons petits anges: This adds a bit more emphasis on the cuteness and charm of the angels.
You can also use more descriptive phrases like:
* Des petits êtres célestes: This means "little celestial beings".
* Des anges adorables: This means "adorable angels".
The best way to choose the right phrase depends on the specific situation and your desired level of formality.