Kat Rybarski has been performing stand up comedy since 2006 and has performed all over the Chicagoland area at nationally recognized venues such as Zanies, The Improv, and The Laugh Factory, as well as more local establishments, including The Comedy Shrine, Westside Improv, and Still Not Friday at Two Brothers Roundhouse. She also made her debut in 2019 with the renowned Comedians You Should Know showcase in Chicago.

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Kat is currently a student in the second city conservatory program, has graduated from both the improv program and the comedy writing program at the Second City Training Center, as well as the improv training program at the Improv Olympic (iO) Training Center in Chicago. In 2011, Kat was named a top five finalist for "Best Local Comedian" through SuburbaNites Magazine.

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She has been a regular cast member of The Bar Show and the Whose Line Improv shows at The Comedy Shrine, and a house team improviser at Westside Improv. More recently she has been a comedy coach for the students on the Lyons Township High School Speech Team, as well as a producer and host for the Still Not Friday comedy showcase. Most recently she hosted and co-produced the monthly Laughs on Tap comedy showcase at Alter Brewing and taught improv classes at the Paramount School for the Arts.