Broadway's "American Idiot" saw a steep dropoff in ticket sales following the departure of special guest star Billie Joe Armstrong.

In the first week following the exit of Amstrong -- who fronts the rock band Green Day [1], upon whose music the production was built around -- the show saw its weekly box-office grosses fall from $1.3 million to $395,275 for its standard eight performances through Sunday, the New York Times [2] reports.

Billie Joe Armstrong Boosts 'American Idiot' Ticket Sales [3]

That sort of dropoff typically leads to the closing of a Broadway show, the Times noted. A show rep declined to comment.

The Times notes that a slew of other cast members also have departed as their contracts came to an end, including Tony-winning star John Gallagher Jr. and Michael Esper.

Meanwhile, "American Idol" Season 1 runner-up Justin Guarin [4]i and AFI [5] frontman Davey Havoc recently joined the cast.

Armstrong's presence typically boosted the grosses by 50 percent.