Seymour-Marsh, who makes his West End debut in Million Dollar Quartet, has previously starred as Buddy Holly in Buddy – The Buddy Holly Story on UK national tour and also played the role for Moonlight Musicals in Lubbock, TX. He has also appeared in Dreamboats and Petticoats on UK national tour and has made numerous appearances at the Queen's Theatre in Hornchurch including Aladdin, The Mysterie of Maria Marten and A Funny Thing Happened On The Way To The Forum.

Seymour-Marsh joins a company that also stars Bill Ward as Sun Records founder Sam Phillips, Ben Goddard as Jerry Lee Lewis, Derek Hagen as Johnny Cash, Francesca Jackson as Dyanne and Michael Malarkey as Elvis Presley.

The show is directed by Eric Schaeffer, with a book by Colin Escott and Floyd Mutrux, and was originally directed and conceived by Floyd Mutrux. The creative team also includes Derek McLane (scenic design), Jane Greenwood (costume design), Howell Binkley (lighting design), Kai Harada (sound design) and Chuck Mead (musical arrangements and supervision). 

It is produced by Relevant Theatricals, John Cossette Productions, American Pop Anthology, John Gore, Thomas B. McGrath, Joseph Smith and Michael McCabe.

Million Dollar Quartet also continues to play at Broadway's Nederlander Theatre and Chicago's Apollo Theatre, and a US national tour is to launch in October 2011. To book tickets, contact the box office on 44 20 7812 7498 or visit www.MillionDollarQuartet.co.uk for more details.