leading lady

noun2

1. •
   A woman who does or can play the lead role in a movie, play or other production; a woman who frequently plays such roles.

   • The leading lady also went out of her way to congratulate the young neophyte effusively on her triumph—and then slapped her unfortunate dresser on very insufficient provocation; […] — 1923
2. •
   The type of conventionally beautiful and approachable woman who is perceived as being capable of playing female lead roles in movies or other productions.