Instead, introduce yourself. Bond on the family level for the first minute or two (or longer if he steers the conversation that way). Then tell him you are breaking into the industry and wanted to know if he'd be open to giving you advice. Because he's family you can offer to take him to lunch or dinner (if he's local).
Treat him professionally by being respectful of his time and make sure you follow up. My first roommate in LA had a powerful Hollywood cousin. He met with him once, got some great advice, and then never called him again. Not only is that not cool for his "business," but he missed out on the opportunity to have a relationship with family when he was across the country from his own. Bad move.
For more tips and articles by top entertainment industry career coach, The Greenlight Coach, visit www.TheGreenlightCoachBlog.com