Clarke Peters and Cynthia Erivo are joining the production
Further casting has been announced for the upcoming concert of How to Succeed in Business Without Really Trying at the Royal Festival Hall on 19 May 2015.
Joining the previously announced Jonathan Groff, Hannah Waddingham and Clive Rowe will be The Wire's Clarke Peters and West End star Cynthia Erivo, who is soon heading to Broadway with the Menier Chocolate Factory's production of The Color Purple.
The show, which is produced by Senbla in association with Elliot Davis, is the first in a new series of musicals in concert which also includes Of Thee I Sing.
It will feature the Royal Philharmonic Orchestra, conducted by Mike Dixon.
How to Succeed in Business Without Really Trying was last seen on Broadway in 2011, starring Daniel Radcliffe as J. Pierrepont Finch, a young ambitious businessman trying to rise to chairman of the board.
Co-producers Ollie Rosenblatt and Elliot Davis said: "We could not wish for a finer ensemble of talent to bring this wonderful score and witty book to life."