Billie Joe Armstrong is indulging his acting bug a bit during Green Day's downtime. The vocalist, who previously appeared on Broadway in the band's 'American Idiot' production, and has guested on TV's 'Nurse Jackie' and had a cameo in the movie 'This Is 40,' will appear in the new movie 'Geezer.'

According to Variety, the movie is music comedy following a father in the midst of a mid-life crisis who holds a lavish 40th birthday party where he runs into his ex-girlfriend and former bandmates who have all moved on with their lives.

Armstrong wrote new songs for the movie and will also perform in the film. 'The initial seeds of 'Geezer' were planted a couple of years ago, when my son was born within weeks of my 40th birthday," says director Lee Kirk. "Billie Joe Armstrong brings an exciting authenticity to the film. He's a dad, he's a musician and he's an incredible talent."

In addition to Armstrong, the film stars Fred Armisen, Judy Greer, Selma Blair, Dallas Roberts, Chris Messina and Brian Baumgartner. Kirk has just started shooting the film in New York City.

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