Zellweger, who plays Roxie Hart, has said of Zeta-Jones: "I had heard that Catherine could sing and dance. People would say 'You're not going to believe it'. Well, I walk in on my first day and she's in the lift singing All That Jazz and I was just dumbfounded.My jaw dropped to the floor. It's not just singing and dancing, she belts it out."
Evening Standard film critic Alexander Walker has described Ms Zeta-Jones as "dancing with all the slinkiness of Cyd Charisse" and hails the movie as a return to the era of the Hollywood greats.