WhatsOnStage Award-winner Hannah Waddingham will perform in a one-off concert at the St James Theatre later this month with her band.
The show, which is on the 20 October, will see Waddingham performing her favourite songs from the worlds of musical theatre, swing and big band.
Hannah Waddingham won a WhatsOnStage Award for her performance as the Wicked Witch of the West in The Wizard of Oz at the London Palladium in 2012. Her other stage credits include Spamalot (West End), Kiss Me, Kate (Chichester/Old Vic) and A Little Night Music (Menier/West End).
She said of the concert: "I'm so glad to finally be able to sing the songs I love and come and support this gorgeous, emerging new theatre. There is nothing like a live theatre audience, booze in their bloodstream and a fabulous band kicking out the best tunes in the world."
Musical theatre star Richard Fleeshman will perform a concert for one night only at the London Hippodrome on 15 October 2013.
The Ghost star won a WhatsOnStage Award for his performance as Sam Wheat in the musical, a role which he reprised on Broadway.
Richard Fleeshman first came to prominence on TV shows such as Coronation Street and All the Small Things. His other stage credits include Legally Blonde, and he has supported Elton John on a European tour. He is "delighted" to be performing again in London.