Fluff time, your movie trivia pt. II (details inside)?

Name a movie where a person acted in it with another sibling or relative OTHER THAN their parents? It can be a grandparent, uncle, sister, brother, etc. any relative other than one who birth, adopted them, or became their parent through marriage. They do not have to be in a starring roll, but had an adequate speaking part, and was in more than one scene. I could give some ”for instance” but that would be a spoiler. Doesn’t matter how old the movie either, big screen or TV.