iO Theater to Host IO45 Anniversary Festival in Chicago
The Kingsbury Street venue celebrates 45 years of improv with a three-day festival starting November 5.
Updated on Oct. 30, 2026 in Comedy
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Chicago's iO Theater will mark its 45th anniversary by hosting the IO45 festival from November 5-7, 2026. The three-day event highlights the legacy of the venue, originally founded in 1981 as the ImprovOlympic.
Why it matters
The festival celebrates the growth and evolution of the improv community over more than four decades. This milestone highlights the resilience of the historic theater, which successfully navigated a pandemic closure before reopening in 2022.
The iO Theater marks a 45-year history since its 1981 founding as the ImprovOlympic. The upcoming IO45 festival spans three days of performances on Kingsbury Street.
The players
iO Theater
This Chicago comedy institution is a renowned center for long-form improvisation.
Charna Halpern
She is the longtime leader who sold the theater following its pandemic-era closure.
Stir Friday Night
This comedy troupe is an AAPI-focused improv group that will host recurring jams at the theater.
The details
Performers will create improv scenes in real time with the audience during the anniversary festival. Featured teams include Improvised Jane Austen, Escándalo, and Stir Friday Night.
Timeline
The iO Theater was founded as ImprovOlympic in 1981.
The theater reopened in 2022 following a pandemic closure.
The IO45 anniversary celebration occurs from November 5-7, 2026.
Monthly AAPI-focused improv jams begin in November 2026.
Industry Dynamics
This celebration reflects the enduring significance of long-form improv in the Chicago comedy scene. The event marks a shift for the theater as it stabilizes under new ownership following the 1981 founding of the original ImprovOlympic.
Attendees can participate in live improv scenes during the three-day festival on Kingsbury Street. Guests looking to attend future programming can also access new monthly AAPI-focused improv jams starting this November.
The takeaway
Chicago comedy enthusiasts have a unique opportunity to engage directly with performers during the anniversary shows. The theater continues to expand its community offerings with new recurring monthly events.
What happens next
Stir Friday Night will host an AAPI-focused improv jam on the second Sunday of every month starting in November 2026.
Further reading
Learn more about the local scene in the Chicago comedy section.
More information
View IO45 event tickets and information to plan your visit.
Source note: This article includes information reported by Chicago Tribune.
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