Beginning November 1, Ralph will step into the role of Madame Morrible. She succeeds Tony winner Judy Kaye, who will play her final performance October 30.

Ralph returned to Broadway in 2002, originating the role of Muzzy Van Hossmere in the Tony-winning musical Thoroughly Modern Millie. On television, she starred as Dee on Moesha, Claudette on Ray Donovan and Maggie on Instant Mom. Her film credits include To Sleep with Anger, for which she won an Independent Spirit Award. Most recently, Ralph wrapped filming Step Sisters and Villa Capri, opposite Morgan Freeman.

The Broadway cast currently includes Jennifer DiNoia as Elphaba, Carrie St. Louis as Glinda, Michael Campayno as Fiyero, Peter Scolari as The Wizard, Dawn E. Cantwell as Nessarose, Michael Genet as Dr. Dillamond and Zachary Noah Piser as Boq.

“The surprising tale of an unlikely friendship between two women in the Land of Oz,” Wicked, according to press notes, “tells the untold story of the Wicked Witch of the West and Glinda the Good, long before Dorothy drops in. Elphaba, born with emerald-green skin, is smart, fiery and misunderstood. Glinda is beautiful, ambitious and very popular. The remarkable odyssey of how these unexpected friends changed each other’s lives for good has made Wicked one of the world’s most popular musicals.”

The Stephen Schwartz-Winnie Holzman musical continues at the Gershwin Theatre.

Tickets are available through Ticketmaster at www.ticketmaster.com/wicked. For more information visit www.wickedthemusical.com.