Headliner and Luminary

Headliner noun - The person who has the most important role in a play, movie, or TV show.

Luminary and headliner are semantically related in celebrity topic. In some cases you can use "Luminary" instead a noun "Headliner", when it comes to topics like star, person who is famous.

Luminary noun - A ball-shaped gaseous celestial body that shines by its own light.

Headliner and luminary are semantically related in person topic. You can use "Headliner" instead a noun "Luminary", if it concerns topics such as star.