Joining the previously announced Staunton, Lara Pulver and Kevin Whately as Mama Rose, Louise and Herbie respectively, will be Gemma Sutton (Carousel, Blues in the Night) as June and Dan Burton (The Pajama Game) as Tulsa.
Completing the line up is Roger Dipper, Clare Halse, Tom Hodgkins, Kieran Jae, Julie Legrand, Danielle Morris, Jack North, Damien Poole, Natalie Woods and Lauren Varnham.
The production sees the reunion of Staunton and director Jonathan Kent following their WhatsOnStage Award-winning version of Sweeney Todd.
With a book by Arthur Laurents, music by Julie Styne and lyrics from Stephen Sondheim, Gypsy has design by Anthony Ward, choreography by Stephen Mear, lighting by Mark Henderson, sound by Paul Groothuis and musical direction from Nicholas Skilbeck.
It runs from 6 October to 8 November 2014.