'The Sound of Music' star Connie Fisher has been forced to pull out of the West End production for two weeks due to a strained vocal cord.
Fisher missed last night's show due to ill health and has now been advised by doctors to rest her voice.
Understudy Sophie Bould will fill the role of singing nun Maria until her return.
A spokesperson for the production said: "Through a desire not to let the public down, Connie Fisher sang through a heavy cold which has caused a vocal injury."
"The vocal chords are a muscle like any other and, as in the sporting world, when injured they require complete rest to recover."
"On her doctor's advice, Connie has to take two weeks off from the show, starting last night, in order to allow the injury time to repair."
Fisher won the role of Maria in the production when she beat thousands of other hopefuls in the reality show 'How Do You Solve A Problem Like Maria?'.