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Pop-punk trio Green Day, from left, Mike Dirnt, Billie Joe Armstrong, and Tré Cool, had their hit 2004 American Idiot album transformed into a stage musical. Armstrong will play drug dealer St. Jimmy for eight performances. ((Tina Fineberg/Associated Press))

Green Day front man Billie Joe Armstrong will briefly join the cast of American Idiot, the Broadway musical he helped create based on the band's 2004 Grammy Award-winning album.

The show's producers announced Sunday that Armstrong will take over the role of persuasive drug dealer St. Jimmy for eight performances from Tuesday through Oct. 3. before leaving town to kick off his band's South American tour.

This is the Broadway debut for Armstrong, who composed and co-wrote the musical.

Armstrong temporarily replaces actor Tony Vincent, who's on leave until Oct. 12 for what producers call a personal family matter.

The musical opened on Broadway in April to good reviews.

The show follows an anti-hero who flees a deadening suburbia and descends into sex, drugs and fierce guitar playing in his quest to find himself in the big city.