しゅえん主演shuen
1.

The act of performing as the principal character in a film or play, highlighting the central role that drives the narrative.

2.

The specific role of an individual actor or actress who leads in a theatrical or cinematic production, signifying their prominence in the performance.

Example:

私は昨日チャーリーチャップリン主演の古い映画を見た。

しゅえんさく主演作shuensaku
1.

A film in which a particular actor or actress takes on the leading role, often showcasing their talent through significant character development and prominent screen time.

2.

A cinematic work that highlights the performance of a main actor, emphasizing their contribution to the film's narrative and overall impact.

3.

A feature film centered around a principal character portrayed by a specific star, with the storyline primarily driven by their actions and experiences.