They are called "The Star"
The lead male role in a production would be called the Principal role. The dancer does not have to be of a "principal" rank in the company to do this role. It depends on the casting of the director or choreographer of the show.
A person who acts as a reserve to a leading actor is called an understudy. They are typically prepared to step in and play the role if the leading actor is unable to perform.
Main role, main character. The leading lady can be referred to as the prima donna.
A: interpreters
The cast of Su tasi - 1993 includes: Asli Janet as Leading Role Fehmi Tengiz
The musical is called Annie, its about an orphan who finds love and happiness when she is adopted by a billionaire.
Art Carney won the Oscar for Best Actor in a Leading Role in 1974.
Emma Thompson won the Oscar for Best Actress in a Leading Role in 1992.
Audrey Hepburn won the Oscar for Best Actress in a Leading Role in 1953.
Al Pacino won the Oscar for Best Actor in a Leading Role in 1992.
Sweet Home Alabama was a movie that starred Reese Witherspoon as the leading role.
Nominated Oscar Best Actor in a Leading Role for: Wag the Dog (1997)Won Oscar Best Actor in a Leading Role for: Rain Man (1988)Nominated Oscar Best Actor in a Leading Role for: Tootsie (1982)Won Oscar Best Actor in a Leading Role for: Kramer vs. Kramer (1979)Nominated Oscar Best Actor in a Leading Role for: Lenny (1974)Nominated Oscar Best Actor in a Leading Role for: Midnight Cowboy (1969)Nominated Oscar Best Actor in a Leading Role for: The Graduate (1967)