8: Number of times she's shown her sporty side at a public engagement, including when she played ping-pong and soccer alongside William and Harry at the launch of the Coach Core charity initiative in 2012 and participated in a hands-on game of volleyball (in wedges) for a SportsAid charity event in 2013.
8: Her shoe size.
9.5: Number of hours between giving birth to Princess Charlotte and leaving the hospital.