"This actress is really incredible in this movie."
Translation:Cette actrice est vraiment incroyable dans ce film.
Hi! Native French speaker here.
In the English sentence, the word they used is actress. Which is a female actor. That’s why, in the French sentence they used the word ”actrice”.
Actor = “Acteur”
Actress = ”Actrice”
Hope this answered your question...
Bonne journée et bonne étude!