Also slated to take part in the Roundabout Theatre Company's Jan. 12 gala fundraiser, featuring a reading of Stephen Sondheim and Hugh Wheeler's Tony Award-winning musical with a 27-member orchestra, are Victor Garber, Laura Benanti, Marc Kudisch and Steven Pasquale.
Additional cast members will be announced shortly, the company said.
The event is scheduled to take place at the Nokia Theatre in Times Square in Manhattan.
Tickets are to go on sale Friday and all proceeds are to benefit the not-for-profit Roundabout Theatre Company, organizers said.
"A Little Night Music" has not been seen on Broadway in 35 years.
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