Oz's population continues to grow.

NBC's upcoming musical event The Wiz Live! has added Orange Is the New Black star Uzo Aduba and Glee's Amber Riley as two of the Good Witches, the network announced Thursday.

Aduba, whose Broadway credits include Coram Boy and the 2011 Godspell revival, will play Glinda, the Good Witch of the South, who gives Dorothy (newcomer Shanice Williams) the famed ruby slippers. Riley, who starred on Glee for six seasons and won Dancing with the Stars in Season 17, will play Addaperle, the Good Witch of the North, who points Dorothy towards the Yellow Brick Road.

Add new fall shows to your Watchlist now!

"We are so happy to welcome two actors we've admired and wanted so much to work with," executive producers Craig Zadan and Neil Meron said in a joint statement. "We look forward to showcasing the amazing musical talents of Amber and we are eager to introduce Uzo's remarkable singing voice for those who know her solely as an extraordinary dramatic actress."

Aduba and Riley are the latest additions to a star-studded cast that includes Queen Latifah as The Wiz, Mary J. Blige as the Wicked Witch of the West, and David Alan Grier as the Cowardly Lion. Williams was announced as Dorothy on Wednesday.

The Wiz Live! is scheduled to air Thursday, Dec. 3 on NBC. Will you watch?