Wyenn was from New York City. He studied acting as teenager under
Michael Chekhov and
Lee Strasberg, among others. He toured nationally with a Shakespearean troupe of actors. Wyenn worked on a farm in Vermont during World War II as part of the U.S. war effort. Than Wyenn and his wife, Gertrude "Guy" Wyenn (November 19, 1921 - April 5, 2018), moved to Los Angeles following the end of World War II. He was cast in a starring role in the world premiere of
Baruch Lumet's stage production
Once Upon a Tailor, which debuted at The Circle Theater. His role in
Once Upon a Tailor earned him a
talent agent, which launched his television and film career. ==Film==