Bruce Willis and Demi Moore's daughter was set to hit the stage as sexy murderess Roxie Hart in Chicago at the Ambassador Theatre in New York from 18 August (15), but she's still not strong enough after suffering a stress fracture in her right foot in June (15) while performing in the Dancing With the Stars Live! Perfect 10 Tour.

Rumer, who won TV talent show Dancing With the Stars earlier this year (15), will now make her debut in the musical on 14 September (15).

A statement suggests Willis is far from recovered and requires "further rehabilitation”.

Singer Brandy Norwood has just completed her tenure as Roxie Hart on Broadway, and stage veteran Amy Spanger is currently playing the role. She will conclude her stint on 16 August (15), and Dylis Croman will step in for Willis.