New York ? Girls just want to have fun – on Broadway.

Cyndi Lauper will join Alan Cumming, Jim Dale, Ana Gasteyer and Nellie McKay in the Roundabout Theatre Company production of “The Threepenny Opera,” opening April 20 at Broadway’s Studio 54.

The pop singer will play Jenny in the Bertolt Brecht-Kurt Weill musical, which begins preview performances March 24. Cumming will portray Macheath, the show’s celebrated Mack the Knife; Dale and Gasteyer, Mr. and Mrs. Peachum; and McKay, their daughter, Polly. Scott Elliott directs.

Wallace Shawn will provide a new adaptation from the original German book and lyrics. Fashion guru Isaac Mizrahi will design the costumes.