Every televised appearance Queen Elizabeth II makes is a carefully orchestrated operation, meticulously prepped for and rehearsed in advance. But while the queen herself only appears during the main shindig, a lot of planning needs to be conducted around her presence. Enter Ella Slack: professional stand-in queen. For the past 30 years, Slack has been waving, sitting and standing in lieu of her majesty, allowing cameras and event managers to adequately prep for the live event. But what qualifies someone to be a royal stand-in? The answer, quite simply, is a regal stature similar to that of her majesty.