The Aga Khan names the day .. London : His Highness the Aga Khan , son of the late Prince Aly Khan , is to wed at the end of the month . He is taking Lady James Crichton - Stuart , daughter of Colonel and Mrs Croker Poole of Kensington, London, as his wife . The couple are seen in this official picture released today . The Aga , who is 32 , is the 40th Immam of the Shia Immami Ismaili Moslems , and spiritual leader of an estimated 20 million Ismailis living all over the world . The couple met in Switzerland in December 1968 . The marriage will take place probably in Paris or Geneva . 7 October 1969