Ka kammala wannan jumla: Lokacin da Welles ya sami kwangilar RKO Pictures, Herrmann ya yi masa aiki. Ya rubuta waƙar fim na farko don "Citizen Kane" (1941) kuma ya sami lambar yabo ta
Nomination na Kyautar Kwalejin don Kyauta mafi kyau na Hoton Hotuna. Ya hada da Welles "The Magnificent Ambersons" (1942); kamar fim din, RKO Pictures ne ya shirya waƙar. Lokacin da aka cire fiye da rabin rabonsa daga waƙar, Herrmann ya yanke alaƙar sa da fim ɗin kuma ya yi alkawarin ɗaukar matakin shari'a idan ba a cire sunansa daga ƙididdigar ba.