He is gathering a small ensemble of seven performers, according to the casting notice, who will not be divided into the show’s traditional roles. The production is “strongly” encouraging performers who identify as transgender, nonbinary or queer to audition, the notice said.

Expect “a nontraditional treatment of the existing material,” a SummerScape spokesman said, “with an emphasis on Loesser’s exquisite score.”

The “Oklahoma!” revival, which stresses the underlying darkness in what had been seen as a sunny American story, took shape at the same Bard festival in 2015, going on to Broadway earlier this year. One of the bigger changes came through in the stripped-down score, orchestrated by a music team that will also join “The Most Happy Fella.”

Loesser wrote the music, book and lyrics for “The Most Happy Fella,” which is based on Sidney Howard’s 1924 play “They Knew What They Wanted." The show is more dramatic than some of Loesser’s better-known comedic hits — including “Guys and Dolls” and “How to Succeed in Business Without Really Trying” — but the music has long been cited as one of his most striking compositions.

The show was revived on Broadway in 1979 and 1992, and enjoyed a New York City Opera production in 2006.