Former 'American Idol' star Kara DioGuardi, who left the series last fall after two seasons on the judging panel, is getting ready to razzle-dazzle New York theater-goers on the Great White Way.

DioGuardi will join the Broadway cast of 'Chicago,' taking over the starring role of Roxie Hart from Christie Brinkley (Renee Zellweger won a Golden Globe for playing the homicidal attention-hound on screen in 2002).

The 'Idol' vet's eight-week stint in the long-running hit musical begins Sept. 5. She tweeted about the thrill of her latest venture: "I'm beyond excited."

DioGuardi, 40, is currently on the panel of experts of Bravo's songwriting competition, 'Platinum Hit.' Raised in the suburbs of New York City, she pursued fame as a rock star before finding success as a songwriter for pop artists.