The concert will take place in conjunction with Brown's production of his musical 13, which runs August 22-25 at the West End venue. The production and the concert will feature members of the NYMT.
Brown's musicals also include Songs for a New World, Parade, and The Last Five Years. He is also working on the Broadway-bound musical Honeymoon in Vegas.
Karimloo has been seen in Les Miserables, The Phantom of the Opera, and its sequel, Love Never Dies. Pulver's credits include Sherlock and Parade.