Mazz Murray is to join the cast of Chicago in the West End.
She will play Mama Morton from July 2, opposite the previously announced Martin Kemp as Billy Flynn.
They will join Sarah Soetaert, Josefina Gabrielle and Paul Rider in the production at the Phoenix Theatre.
A new booking period for the production has also been announced, with tickets now available until January 5, 2019.
Kemp will be performing in the production until September 2, with Soetaert, Gabrielle, Murray and Rider staying until August 11.
Chicago has a book by Fred Ebb and Bob Fosse, music by John Kander and lyrics by Ebb.
The musical is directed by Walter Bobbie and produced in the West End by Barry and Fran Weissler.