Joining the previously announced cast including Jenna Russell, Marc Elliot and Jonathan Slinger will also be Nathan Amzi as Officer Barrel.
The rest of the cast comprises Chris Bennett, Katie Bernstein, Alasdair Buchan, Cory English, Madeleine Harland, Rosanna Hyland, Karis Jack, Julie Jupp, Aaron Lee Lambert, Vicky Lee Taylor, Mark Meadows, Christina Modestou, Joel Montague, Jeff Nicholson and Kane Oliver Parry.
Matthew Seadon-Young appeared in the St James Theatre production of Urinetown, and has other credits including Les Miserables and The Architects. Nathan Amzi's stage credits include In the Heights and Rock of Ages, and he also appeared on TV talent show The Voice.
Urinetown is designed by Soutra Gilmour, with choreography by Ann Yee, lighting by Adam Silverman, sound by Terry Jardine and Nick Lidster and musical supervision by Alan Williams. It runs at the Apollo Theatre from 29 September 2014.