Costume designer Theadora Van Runkle created Dunaway's now-iconic look for the 1968 Oscars.
The designer behind Bonnie and Clyde (1967), The Thomas Crown Affair (1968) and The Arrangement(1969), all of which starred Dunaway, was known to design for the actress offscreen, too. Van Runkle, who died from lung cancer at age 83 in 2011, earned an Oscar nomination for her work in Bonnie and Clyde. Thanks to Van Runkle's creations for Dunaway's Bonnie, the midi-skirt look (a blouse and narrow skirt, paired with a beret) became, and remains, a major street-style trend among women.