B1
The lead performer or lead part in a performance is the main performer or part.
Dictionary examples:
The lead actor forgot his pants and performed the whole play in underwear! (0.0)
The lead dancer slipped on a banana peel and moonwalked across the stage! (0.0)
The lead actress sneezed and her wig flew off, landing on the director's head! (0.0)
Who played the lead role? (37.5)