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iO's FIRST COMEDY FEST IS HERE!

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CHICAGO'S BEST IMPROV COMEDY

THE BIRTHPLACE OF LONGFORM IMPROV & HOME TO SOME OF THE BEST IMPROV COMEDY SHOWS IN THE COUNTRY!

See our full calendar of Shows

INSPIRING GENERATIONS OF AMERICA'S BRIGHTEST COMEDIC ENTERTAINERS SINCE 1981!

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WHIRLED NEWS TONIGHT

THE NEWS IS REAL. EVERYTHING ELSE IS IMPROVISED.

SATURDAYS AT 8PM - Read more & buy tickets!

THE IMPROVISED SHAKESPEARE CO.

A two-act fully improvised play in Elizabethan style using the language and themes of William Shakespeare.

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PERFORMED 7 NIGHTS A WEEK

See all of our Harold teams

Upcoming Events

Del Close Theater

Virgin Daiquiri

The Harold Team Artemis

Wed 7/18

8:00 pm

Chicago, IL

More Info

The Late 90's

The Harold Team Duchess

Poster Boys

Wed 7/18

10:00 pm

Chicago, IL

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THE IMPROVISED SHAKESPEARE COMPANY

Thu 7/19

8:00 pm

Chicago, IL

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The Scene

The Harold Team Mean Streak

Thu 7/19

10:30 pm

Chicago, IL

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Mission Theater

Longform Jam

Wed 7/18

8:00 pm

Chicago, IL

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Teacher Jam

Wed 7/18

10:00 pm

Chicago, IL

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Glass Basement

Thu 7/19

8:00 pm

Chicago, IL

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A Very Fine Evening

Thu 7/19

10:00 pm

Chicago, IL

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Chris Farley Cabaret

Felt: An Improvised Puppet Show

The Harold Team ‘66 Mustang

Wed 7/18

8:00 pm

Chicago, IL

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CAGEMATCH

Wed 7/18

10:30 pm

Chicago, IL

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SmallProv

Thu 7/19

8:00 pm

Chicago, IL

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Girl Gang

Thu 7/19

10:00 pm

Chicago, IL

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Jason Chin Cabaret

Face Plants with Carl and The Passions

The Harold Team Bad Bear

Wed 7/18

8:00 pm

Chicago, IL

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Seriously Unprepared

The Harold Team Lou Malnati’s Presents: The Harold

Wed 7/18

10:30 pm

Chicago, IL

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The Harold Team Meridian

The Harold Team Miracle Ranch

Thu 7/19

8:00 pm

Chicago, IL

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Stir Friday Night Presents: The SFN Effect!

Thu 7/19

10:00 pm

Chicago, IL

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“This is the most important group work since they built the pyramids” - Bill Murray

Considered to be the Mecca of improvisation, the iO Theater boasts an Improv Training Center that has helped train and develop the talents of an entire generation of America’s best and brightest comedic entertainers for over 30 years. Want more? Our Writing Program and battery of electives will help you develop whatever comedy skills you need!

  • IMPROV TO SKETCH

  • IMPROV

  • INTENSIVES

  • ELECTIVES & WORKSHOPS

  • View All Classes

    Training America’s Best Comedic Entertainers for over 30 years

    Widely considered to be the premier venue for long-form improvisational performances and classes, the iO Theater (formerly known as the ImprovOlympic Theater) was founded in 1981 by Charna Halpern and the late great improvisational teacher and director, Del Close.

    Chicago's Favorite Comedy Spot

    The iO Theater is the home of long-form improvisation and Chicago's Best Improv Comedy.

    Located in Chicago's Lincoln Park Neighborhood, the iO Theater features 4 theaters (with shows 7 nights a week), 2 bars, a kitchen, beer garden, and Event space with over 33,000 square feet of space.

    WHEN IT COMES TO COMEDY, WE'RE ALL BUSINESS.

    Do you want entertainment for your conference, meeting or celebration? Let iO put together a hilarious improv show to bring down the house or have us write customized material to make light of issues related to your company or business field. If you can dream it up, we can handle it. If you can’t, then we’ll take care of that too.

    Our writers have gone on to work at such shows as Saturday Night Live, The Daily Show, The Colbert Report, Late Night with Conan O’Brien, 30 Rock and MADtv, and countless other shows. So rest assured knowing you’re in good hands.