We're delighted to reveal further line-up details for the 2014 WhatsOnStage Awards Concert, which takes place on 23 February 2014 at the West End's Prince of Wales Theatre.

Newly announced performers include Michael Xavier and Charlotte Wakefield, who starred in the Open Air Theatre's record-breaking revival of The Sound of Music last summer, and Once duo Declan Bennett and Zrinka Cvitešić.

Also appearing are Cynthia Erivo (I Can't Sing!), the cast of Sondheim revnue Putting it Together, as well as Fra Fee (Candide) and Lisa-Anne Wood (Les Miserables), with more to be announced.

Voting for this year's awards closed on 31 January, with more people than ever before participating in the nominations and final voting phase.

Among this year's nominated shows are The Book of Mormon, currently playing at this year's host venue, vying for votes with the other major musicals of the year – Charlie and the Chocolate Factory, The Light Princess, Once and From Here to Eternity.

The 2014 WhatsOnStage Awards Concert is directed and devised by Russell Labey, choreographed by Nick Winston, with musical supervision and orchestrations by Tom Deering, lighting by Derek Anderson and sound by Ben Harrison. The general manager is James Mullan, and it's produced by Stuart Piper and Jason Haigh-Ellery.

For more on the 2014 WhatsOnStage Awards, visit awards.whatsonstage.com

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