What do you call An actress who plays a young woman in play?

There isn't a specific term for an actress who plays a young woman in a play. However, you can use some descriptive terms depending on the context:

* Young actress: This is a general term that simply indicates the actress is playing a young role.

* Child actress: This term is typically used for actresses who are actually children, but could be used for a young-looking actress playing a young role.

* Ingenue: This term is often used in theater to describe a young, innocent, and often naive female character. While it doesn't refer to the actress directly, it describes the type of role she's playing.

* Teenage actress: This is more specific and indicates the actress is portraying a character in their teenage years.

* Actress playing a youthful character: This is a more precise way to describe the situation.

Ultimately, the best term to use will depend on the specific context of the play and the age of the actress.