More casting has been revealed for Red Bull Theater's upcoming benefit performance of the seldom-produced rock musical Your Own Thing, which will be led by Tony winner Santino Fontana as previously announced. With Gabriel Barre at the helm, the event is set for December 12 at Peter Norton Symphony Space.

Newly joining the cast are real-life siblings Eddie Cooper and Lilli Cooper, who will star as twins Sebastian and Viola; and Jennifer Sánchez, with special appearances from Michael Cerveris, Robert Cuccioli, Tovah Feldshuh, Richard Kind, Ken Page, Patrick Page, Estelle Parsons, Jay O. Sanders, Mary Testa, John Douglas Thompson, and Bruce Vilanch.

Adapted from Shakespeare's Twelfth Night by Hal Hester and Danny Apolinar, Your Own Thing premiered at Off-Broadway's Orpheum Theater (current home to Stomp) in 1968, shortly after Hair made its debut down the street at the then-newly-built Public Theater. Both musicals would go on to become big hits of the rock musical genre, with Your Own Thing running for 933 performances before touring North America. In the years since, the success of Hair has all but eclipsed Your Own Thing's, with Red Bull's upcoming concert production a rare presentation of the seldom-produced work.

The benefit will feature a book adaptation by Donald Driver and music direction by Greg Pliska.

For tickets, visit RedBullTheater.com.