a woman who performs in movies, television shows, or plays
The actress plays a detective in the new movie.
That actress is on a popular television show.
In American English, actor is often used for a person of any gender. Actress specifically means a woman.
Common phrases & grammar
famous actress · leading actress · talented actress · award-winning actress
an/the actress + in + a movie/play/TV show
the actress + plays + a character/role