Louise, who was due to star as the leading lady in the show alongside Love Island's Amber Davies, cut her chin open and fractured her wrist after the fall, with paramedics taking her straight to hospital.
Louise Redknapp has been forced to pull out of the new Dolly Parton musical 9 to 5 after a dramatic fall.
The singer had been in rehearsals for a musical version of Dolly Parton's most famous film, in which she was set to play Violet Newstead.
Her doctor is said to have ordered the actress to take two months off, meaning she won't feature in the original run of the show. Due to a nasty fall I have only gone and fractured my wrist and got 10 (yes 10) stitches in my chin.
"Following my doctors orders - they have said I will be ok but as they say in the theatre "the show must go on" and I wish the rest of the fabulous cast an awesome opening night and I will be back on that stage for 9-5 before you know it".
A source spoke to The Sun, explaining how disappointed Louise is about the news.
However, the tumble means doctors are now warning her she could miss the show altogether. "It doesn't seem fair", they added.
"Due to an injury this week, Louise Redknapp has had to temporarily withdraw from performing the role of Violet in 9 to 5: The Musical".
"The recovery time recommended means Louise is no longer able to properly rehearse the show in the remaining time left before opening", they said in a statement.
'Together we have made the hard decision to delay Louise's start date in the show.
They said: "We hope Louise will start performances towards the end of March or early April".
Louise continued, "Following my doctors orders- they have said I will be ok but as they say in the theatre "the show must go on" and I wish the rest of the fabulous cast and wonderful opening night and I will be back on that stage for 9-5 before you know it".