John Mulaney… Broadway composer?

He co-wrote and stars in Original Cast Album:Co-Op, a playful send-up of D.A.

Pennebakers 1970 doc about Stephen SondheimsCompany.

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Credit: Rhys Thomas/IFC

They became real songs, new songs, but they started out as blatant copies.

It was me, a dog, a rhyming dictionary, and an iPhone playing Sondheim melodies.

For Mulaney who worked as a writer onSaturday Night Livewith both Meyers and Pell it was a familiar vibe.

But the episodes standout track is My Home Court, a catchy ode to apartment decor sung byHamiltonalum Goldsberry.

(Sample line: And the brown and the beige, and the brown and the beige.)

Sadly, not every song made the final cut.

I am sorry we didnt crack that one.

Still, he says, we may yet seeCo-Opstaged for real one day.

Theres six songs, Mulaney muses.

Maybe if we get the Chinese food one going, [that could be] your big curtain number.

I think you could make a one-act out of it.

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