Charna Halpern is the co-founder and Artistic Director of the iO Theater and has been teaching performers how to work together for more than 35 years.

In 1984, with partner Del Close, she began teaching iO’s world-famous signature piece, ‘The Harold’ to many students in the Chicago theater community and hasn’t stopped since.

Her theaters in Chicago and Los Angeles are the meccas of training in the art of improvisation and act as a recruiting stop for television shows like Saturday Night Live, CONAN, The Daily Show, The Colbert Report and countless other shows.

She and Del Close co-authored the book Truth in Comedy: The Manual of Improvisation with editor Kim “Howard” Johnson in 1994, published Group Improvisation in 2003, and Art by Committee in 2006.