First Utterance is the debut album of the progressive folk band Comus. It was released in 1971, with the opening song "Diana" being released as a single.

First Utterance was notable for its unique blend of progressive rock, folk, psychedelia, and elements of paganism and the macabre. The overall thematic tone of the album is of vulnerable innocence facing abusive power, with songs dealing with such themes as necrophilia ("Drip Drip"), rape ("Diana", "Song to Comus") and shock therapy ("The Prisoner"). The record features an acoustic sound, including acoustic guitar, violin, flute, and lyrical, almost Arcadian, female harmonies.

References to Comus by other bands and artists include Opeth, citing its lyrics in album and song titles and tattoos. Experimental outfit Current 93 also covered "Diana" as the opening song on their 1997 LP Horsey.