Vivien Parry and Stephen Boswell continue in their previous roles as Madge Hardwick and the valet Bates, respectively.
Ensemble and swing members are Michelle Andrews, Caroline Bateson, Jeremy Batt, Charlie Bull, Alan Burkitt, Matthew Cheney, Louise Davidson, Russell-Leighton Dixon, Matt Gillett, Jonny Godbold, Ian Goss, Fenton Gray, Alyn Hawke, Lauren Jade, Paul Kemble, Jenny Legg, Martin McCarthy, Grace McKee, Debbie Paul, Holly Rostron, Callum Train, Lois Urwin, Graham Vick, Alexandra Waite-Roberts and Aron Wild.
Williams, who will play Dale Tremont, joins Top Hat directly from the Broadway production of Nice Work If You Can Get It and previously Anything Goes, both directed and choreographed by Kathleen Marshall. She has also appeared in the Broadway production of Promises, Promises directed by Rob Ashford. She has been a regular performer in the City Center Encores! seasons performing in Follies, Applause and Face The Music.
Hayward, who will play Horace Hardwick, has most recently been seen at the Trafalgar Studios as Bernard Woolley in Yes Prime Minister. Previous theatre credits include Much Ado About Nothing at Wyndham's Theatre, Private Lives and Cyrano de Bergerac at the Royal Exchange Theatre, and Earthquakes in London for the National Theatre.
To book tickets, which are now on sale through April 27, 2014, contact the box office on 0844 847 1712, or visit www.tophatonstage.com for more details.