HRH The Prince Philip , Duke of Edinburgh , Earl of Merioneth and Baron Greenwich , KG , KT , OM , GBE , AC , QSO , PC ( born Prince Philippos of Greece and Denmark , 10 June 1921 ) is the husband of Queen Elizabeth II . Philip was originally a royal prince of Greece and Denmark . Prince Philip , Duke of Edinburgh ( born Prince Philip of Greece and Denmark ; 10 June 1921 ) is the husband of Elizabeth II .