They will be also be newly joined by Lillie Flynn (Nessarose), Christopher Howell (Doctor Dillamond) and Adam Pettigrew (Boq), with Rachel Tucker and Julie Legrand continuing as Elphaba and Madame Morrible respectively.
Beck, who is currently appearing on the London stage in The Belle's Stratagem at Southwark Playhouse, recently finished a two-year run starring as Christine Daaé in Andrew Lloyd Webber's The Phantom of the Opera at London's Her Majesty’s Theatre. She made her West End debut in 2006 as Cosette in Les Misérables at the Queens Theatre and recently performed in the 25th Anniversary Concert at The O2.
Willis, who in 2010 made his West End debut in Flashdance at the Shaftesbury Theatre, was a member of the chart-topping band Busted. In 2006 he won the popular ITV show "I'm A Celebrity…Get Me Out of Here!"
Barrit previously starred in Wicked in 2008/9. He recently played Falstaff in Henry IV Parts One and Two for peter Hall at the Bath Theatre Royal.
To book tickets, contact the box office on 0844 826 8000, or visit www.WickedTheMusical.co.uk for more details.