Stone to cast?

EMMA

Think of a first name shared by a famous actress and a classic novel’s matchmaker.

This clue plays on the phrase "cast a stone," which usually means to judge or criticize someone. Here, "stone" hints at the surname of actress Emma Stone, while "to cast" refers to assigning a role in a film. The answer is her first name, "EMMA," making it a clever nod to both the literal and Hollywood meanings.