Olivia is the oldest of the Van Der Beek kids. Born on Sept. 25, 2010, Olivia is certainly the apple of her father's eye. He recently shared a touching photo in honour of her birthday, writing, "Nine years old today. My oldest. My conscience. My heart. I don't think I could ever teach her anywhere near as much as she's taught me. Thank you for choosing us, my love . . . Every member of our family is the beneficiary of your grace, your fire, your patience, compassion and your sage advice. This one came out parent-proof." How sweet is that?