noun, noun or participle which takes 'suru'
guest appearance; guest starring
Used when a person appears as a guest on a TV show, in a movie, at an event, etc. Often used with する to mean 'to make a guest appearance'.
人気俳優がドラマにゲスト出演した。
A popular actor made a guest appearance on the drama.
来週の番組にゲスト出演する予
I'm scheduled to guest-star on next week's show.