Erin Mackey will join previously announced cast members Barbara Cook, Leslie Kritzer, Norm Lewis, Euan Morton, Matthew Scott, Vanessa Williams, and Tom Wopat in the Broadway production of Sondheim on Sondheim. Conceived and directed by James Lapine, this new music theater piece with music and lyrics by Stephen Sondheim will play a limited engagement at Roundabout Theatre Company's Studio 54, March 19-June 13, with an opening on April 22.

The creative team will include Beowulf Boritt (scenic design), Susan Hilferty (costume design), Ken Billington (lighting design), Dan Moses Schreier (sound design), and Peter Flaherty (projection design). Musical direction will be by David Loud.

This new production continues the theater's longstanding relationship with the composer-lyricist. The Roundabout has previously produced five of his musicals: Company, Follies, Assassins, Pacific Overtures, and Sunday in the Park with George, and it presented a gala concert reading of A Little Night Music, starring the late Natasha Richardson and her mother, Vanessa Redgrave, earlier this year.

Mackey recently made her Broadway debut as Glinda in Wicked after having performed the role in both the Chicago and Los Angeles companies. Her film/TV credits include The Parent Trap, Do Over and Family Affair.

For further information, visit www.roundabouttheatre.org.