In Once Upon A Time In Hollywood (2019), we see Sharon Tate walking past a movie theater that is featuring a movie with her in it. She decided to watch it and asks to buy one ticket. The attendant told her it was $0.75 and as she went to pay, Sharon told the attendant that she was in the movie and eventually made her way into the movie theater for free.
Why? She was well-off if not rich, so why do this? I do not think it was just to get attention because she specifically said, "What if I was in the movie?" as opposed to just saying, "You know, I am in this movie!".