be dressed (up) to the nines

To be very well-dressed and fashionable, typically for a formal event. I have to be dressed to the nines at this gala tonight—a lot of important people will be there. The whole family will be dressed up to the nines at the wedding, I'll make sure of it.

Common Names:

Name	Pronounced	Usage
Pili	PEE-lee	Spanish
Andebert	-	Ancient Germanic
LÉOpold	-	French
Selene	sə-LEE-nee (English)	Greek Mythology, Greek
Svjetlana	-	Croatian, Serbian
Priyanka	-	Indian, Hindi, Marathi, Telugu, Tamil, Malayalam, Kannada, Bengali