Boris Mikhailovich Skossyreff (Russian: Бори́с Миха́йлович Ско́сырев, romanized: Boris Mikhailovich Skosyrev; Catalan: Borís Mikhàilovitx Skóssirev pronounced [boˌɾis .mikˌaj.lo.vit͡ʃ sˈko.si.ɾef]; 12 January 1896 - 27 February 1989) was a White Russian adventurer who attempted to seize the monarchy of the Principality of Andorra during the early 1930s, styling himself Boris I of Andorra. He assumed the throne with support from the local citizens and government, before being deposed by neighboring Spanish authorities and eventually fading into obscurity.