Del Close

Del Close (March 1, 1934 – March 12, 1999) was an American actor, comedian, and improv pioneer who revolutionized improvisational comedy in the United States. He co-founded the ImprovOlympic in Chicago and developed the famous Harold format, a long-form improvisational structure that became fundamental to modern improv comedy. Close was renowned as a teacher and mentor, training some of the most successful comedians of the late 20th century, including Mike Myers, Tina Fey, and many cast members of Saturday Night Live. His distinctive appearance—often sporting a shaved head and goatee—and his commitment to treating improv as a serious theatrical art form helped legitimize the genre. Close's legacy extends far beyond his own performances; his teaching methods and comedic philosophies continue to influence improv communities worldwide. He received numerous accolades for his contributions to comedy, including being named a founder of modern improvisational theater.