He has done non-musicals before. The very first cast album had a number about Amadeus (using music from Marriage of Figaro). I also recall a 'Night Mother sketch and a Beauty Queen of Leenane sketch, as well as a My Fair Lady parody regarding Madonna in Speed the Plow. Now looking at track listings, I see that there was also numbers about Dustin Hoffman in Merchant of Venice, Master Class (though really only as a setup to spoof musical-based happenings), and August: Osage County.