Tori Amos' hotly anticipated new musical that was due to premiere at the National Theatre next year has been "postponed indefinitely", according to the Guardian.

The show, an adaptation of George MacDonald’s 1864 fairy tale The Light Princess, was announced back in January and had been expected to premiere in the NT Lyttelton next April.

A spokeswoman told the Guardian that "development is continuing" on the production, which is being directed by Marianne Elliott (War Horse), and that a new date for its premiere would be announced "in due course."

In MacDonald’s story, a princess is cursed with a lack of gravity and the only time she doesn’t float up into the air is when she’s swimming. Because of her relationship with water, if she can master the art of crying, there’s a chance she may be grounded and be able to marry the noble prince who has fallen in love with her.

Tori Amos has sold more than 12 million records worldwide. Her singles include "Crucify", "Silent All These Years", "Cornflake Girl", "Caught a Lite Sneeze", "Professional Widow", "Spark" and "A Sorta Fairytale".