It turns out, the King of the Netherlands has an air transport pilot certificate:
King Willem-Alexander, reigning monarch of the Netherlands, revealed in an interview with Dutch newspaper De Telegraaf that he'd regularly flown flights for a subsidiary of the Dutch flag carrier for over two decades.
Calling the part-time role a "hobby," the King says that he'd taken to the cockpit as a co-pilot of KLM Cityhopper -- the airline's short-haul carrier -- flights for over 21 years.
Being the co-pilot also allowed him to retain his anonymity, even while addressing the passengers, he said.
"The advantage is that I can always say that I wish everyone a heartfelt welcome in the name of the captain and the crew," he told De Telegraaf. "So I don't have to say my own name. But most of the (passengers) don't listen anyway."
That's kind of cool.