Block will fill in for Tony Award-winning star Sutton Foster, who is filming the television pilot Bunheads.
The production, which is directed and choreographed by Kathleen Marshall, also stars Joel Grey as Moonface Martin. The production is scheduled to run through April 29.
Block's many stage credits include 9 To 5: The Musical, Wicked, The Pirate Queen, The Boy From Oz, and By the Way, Meet Vera Stark.
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