Is the movie Chicago about rock group Chicago?

No, the movie Chicago (2002) is a musical film adaptation of the 1975 stage musical of the same name. It is set in Chicago in the 1920s and tells the story of two rival vaudevillian murderesses, Velma Kelly and Roxie Hart, and their pursuit of fame. The movie Chicago does not have any connection to the American rock band Chicago, which was formed in 1967 and is known for its horn-infused rock music.