first night 
noun
The first public performance of a play or show: tickets for the first night sold out fast [as modifier]: some of the numbers appeared to be under-rehearsed, but maybe they were suffering first-night nerves...
- Occasional first-night glitches were far outweighed by the spirit of the acting.
- We were invited to the first-night party, but were both tired.
- The adult first-night audience of Peter Pan, told to clap if they believed in fairies, applauded thunderously: it was the birth of modern escapist entertainment.
- well-housed
- well-hued
- well-humored
- well-humoured
- well hung
- well-husbanded
- well, I declare
- wellie
- well I'll be (or I'm) damned
- well, I'll be (or I'm) jiggered
- head someone/thing off
- headspace
- head spade
- Head's paradoxical reflex
- head-spinning
- head-splitting
- headspring
- headsquare
- Head's reflex
- headstall
- headstand
- headstander
- head start
- head station
- headstay