Star?

It just occured to me that regardless of what part a person plays in a porn movie, they are referred to as a porn "star". Not a porn "actor" or "participant". I mean, *some* of them are famous, and therefore potentially "stars"...but not many.
There just isn't a less-boastful generic term for them.
For example, not everyone is a rock star, some are just "musicians". There isn't an equivalent in the porn world.