Faye Dunaway had proved to be difficult and many actresses had been considered for the role, including Jane Fonda, Tuesday Weld, Ann-Margret, Carol Lynley, Leslie Caron, and Natalie Wood. Penn loved Dunaway and managed to convince actor and producer, Warren Beatty, who played Clyde Barrow in the film, that she was right for the part. Besides her relative anonymity, Beatty's concern was her "extraordinary bone structure", which he thought might be inappropriate for Bonnie Parker, a local girl trying to look innocent while she held up smalltown Texas banks. However, he changed his mind after seeing some photographs of Dunaway taken by
Faye Dunaway Globe nomination and a BAFTA nomination. Upon the release of the film, producer Robert Evans was full of praise for Dunaway. "She has everything—beauty, talent, neurosis. She's one of the great strange ones. When the lights go out and that face comes out of the dark and she looks at you with those big mysterious eyes, I tell you, it's a very compelling thing. She has something we haven't seen on the screen for a long time. She has witchery. She's a femme fatale." That same year, Dunaway appeared in a television adaptation of "After the Fall" with Christopher Plummer.