According to the film documentary included with the extended DVD release, choreographer Onna White was able to take someone not well known as a dancer, and make him (Hackett) a dancing star for this number.
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The chorus sings "Do re mi fa so la si do" despite the fact that the work of John Curwen had earlier substituted "Do re mi fa so la ti do" as the English standard.
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The solfege used by the chorus deviates from standard English-language solfege in several ways; within the context of the musical, some or all of these errors may be attributable to the fact that Marcellus, a former con artist, does not have formal musical training in his "professional" background.