debutant
US /ˈdeb.jʊ.tɑːnt/
UK /ˈdeb.jʊ.tɑːnt/

1.
debuttante, esordiente
a person making a first public appearance, especially in society or in a professional capacity
:
•
The young actress made her debutant performance in the new play.
La giovane attrice ha fatto la sua performance da debuttante nel nuovo spettacolo.
•
She was a debutant at the annual ball.
Era una debuttante al ballo annuale.