This article focuses on the notion of cultural omnivorousness, as coined by Richard Peterson, to explore its various manifestations within the American musical, commonly known as the Broadway musical. Through two interconnected research questions, we explore how patterns of cultural omnivorousness are manifested within the American musical, contemporarily and in a historical perspective, and scrutinize what these omnivorous features demand from performers, more specifically, what it takes to perform what we name the omnivorous voice. Using the American musical as a site for exploration, the article aims to show that the omnivorousness is not only enjoyed by its audiences, but produced, brought about and enjoyed by its composers, producers and performers alike. Consequently, the article’s main argument is that the phenomenon of cultural omnivorousness not only concerns cultural consumption but is to be regarded as a matter of cultural production as well, manifested ultimately as specific artistic and embodied practices. The article conveys a theoretically informed discussion, drawing on works written within the fields of cultural sociology, musicology and voice studies, while incorporating illustrative references to specific recorded musical works and the vocal behaviours of named performers.