Watch Dancing on Ice judge Jason Gardiner transform into Sylvia St Croix ahead of the West End premiere of Ruthless!, which opens at the Arts Theatre in March.
Joel Paley and Marvin Laird's all-female character musical tells the story of a talented eight year-old who will do anything to play the lead in her school play.
Directed by Richard Fitch with choreography by Rebecca Howell and musical supervision by Gareth Valentine, the comedy spoofs Broadway shows such as Gypsy and Mame.
Gardiner's stage credits include 42nd Street, West Side Story and My Fair Lady. Bennett was most recently seen in Follies at the National Theatre and other theatre roles include her award-winning turns in Hairspray and She Loves Me.
The production will have design by Morgan Large, lighting by Tim Lutkin and sound by Gregory Clarke. The Menier Chocolate Factory will act as executive producer and general manager.
Ruthless! the Musical runs at the Arts Theatre from 27 March to 23 June, with previews from 16 March.