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 by Dustin Hoffman. The film was widely praised by critics and was one of Dunaway's few commercial successes at this point. That same year, she appeared in the lead role in "Puzzle of a Downfall Child" (1970), an experimental drama directed by Jerry Schatzberg and inspired by the life of model Anne St. Marie. The film failed to generate commercial interest, though it earned for Dunaway a second Golden Globe nomination, for Best Actress – Motion Picture Drama. The film remained in obscurity over 40 years, until it was revived at the 2011 Cannes Film Festival in honor of Dunaway.