(CNN)They don't call KLM "Royal Dutch Airlines" for nothing. 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. http://www.cnn.com/2017/05/18/europe/netherlands-king-willem-alexander-klm-pilot/