Why 'Jersey Boys' Will Work on the Big Screen

After grossing more than a billion dollars worldwide as a stage production, some fans are understandably skeptical about the choice to bring the musical to the big screen, but ET is breaking down why the decision makes sense.

After grossing more than a billion dollars worldwide as a stage production, some fans are understandably skeptical about the choice to bring the musical to the big screen -- especially with Clint Eastwood directing -- but ET is breaking down why the decision makes sense.

While the songs of Jersey Boys are good, clean fun, there is a darker side to the story, which is where Clint Eastwood comes in. The four-time Oscar winner is a master at grit, which will come in handy with the mob plotlines.

Something fans might not know about Clint -- he's a world-class musician!

The 83-year-old veteran actor even had a music scoring stage named after him on the Warner Bros.' lot.

"Many of my films were scored here," said Clint.

Clint even got the chance to bust a tune in the 1969 film Paint Your Wagon. Watch the video to hear Clint's golden pipes.

Jersey Boys opens June 20.