Trivia: In 'Cell Block Tango', the scarves represent murder. While the other four murderesses carry only one red scarf, Velma carries two (one for her husband and one for her sister) and Catalina has one white scarf to show that she alone is innocent.
Trivia: For anyone who was curious: this is Hunyák's story in the cell block tango (translated from Hungarian) "What am doing here? They say my famous lover held down my husband while I chopped off his head. But it isn't true, I am innocent. I don't know why Uncle Sam says I did it. I tried to explain it at the police station but they did not understand me."
Trivia: Catherine Zeta Jones specifically requested to have a short haircut for this movie so that the audience could easily see her face and not doubt that she did all the dancing herself.
Trivia: Roxy Hart was based on Beulah Annan who murdered her lover after he said he was leaving her. Velma Kelly was based on Belva Gaertner who murdered her younger, married boyfriend and used the exact same defense of suffering from a black out.
Trivia: John Travolta was offered the part of Billy Flynn but turned it down because he couldn't see how the stage play "Chicago" could be effectively turned into a film.
Trivia: Billy Flynn was based on "Easy Eddie" O'Hare, a Chicago mob lawyer of the 1920's. O'Hare's son, Butch, was a decorated Navy flyer killed in World War II. The Chicago airport was named in his honor.
Trivia: In the scene where Roxie is waiting to meet the Matron, a fellow inmate asks her if she has had Morton before. The actress is Chita Rivera, who was the original Velma Kelly years ago.