|Born||Chicago, Illinois, U.S.|
Charna Halpern (born 1952) is a co-founder of the ImprovOlympic, now known as iO. She was born and raised in Rogers Park, Chicago on the north side of Chicago. In 1984, with partner Del Close, she began teaching Harold to many students in the Chicago theater community. She and Close co-authored the book Truth in Comedy: The Manual of Improvisation with editor Kim "Howard" Johnson in 1994. She published Group Improvisation in 2003 and Art by Committee in 2006.
- Hicks, Margaret (2011). "10 Truth in Comedy". Chicago Comedy: A fairly Serious History. The History Press. Retrieved 2012-01-25.
- Obejas, Achy (2001-04-03). "Comedy Guru Charna Halpern Carries On". The Chicago Tribune. Retrieved 2012-01-26.
- Halpern, Charna; Close, Del; Howard, Kim (1994). Truth in Comedy. Meriwether Publishing. ISBN 978-1-56608-003-3.
- Halpern, Charna; Gwinn, Peter (2003). Group Improvisation. Meriwether Publishing. ISBN 978-1-56608-086-6.
- Halpern, Charna (2006). Art by Committee. Meriwether Publishing. ISBN 978-1-56608-112-2.
- Armour, Terry (2006-03-26). "Personals: Who's Who & What's Up". The Chicago Tribune.
- An interview with Charna on BLACKOUTpresents: Radio
- An interview with Charna about Del Close on the The Poor Choices Show
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