CHICAGO (WGN) — Chicago is the birthplace and the big leagues of improvisational comedy. In a city packed with talent, it's not every day you see performers pioneer new territory.

Comedians who call themselves "the world’s most unexpected comedy troupe" performed at Theatre on the Lake on Aug. 7 as part of their Midwest tour.

"We are extraordinary," said Audrey Castilow, 31, a former high school thespian and comedic actor.

She’s a member of the Improvaneers, the first improv team made up entirely of performers who have Down Syndrome.

"We have an extra chromosome that makes us—that is different about each of us," Castilow said.

Rob Snow, the founder of the Improvaneers, said he knows the show is as much about performance as it is about perception.

"The misperception is they’re like th

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