Chris Elliott is all grown up, and has a daughter who’s all grown up, too! Abby Elliott (she’s a regular on ‘Saturday Night Live’) appeared on ‘Late show with David Letterman’ (weeknights, 11:35PM ET on CBS), while her dad watched nervously backstage in the green room. If only that annoying guy sitting next to him would just leave him alone! This may be the only time in history when someone told Ewan McGregor, “I don’t know who you are, but can you shut up?!”

Chris Elliott Gives Ewan McGregor the Brush-Off (VIDEO)