Marilyn Monroe By Bertram Stern

Niagara
Darryl F. Zanuck considered that Monroe's film potential was worth developing and cast her in Niagara, as a femme fatale scheming to murder her husband, played by Joseph Cotten. During filming, Monroe's make-up artist Whitey Snyder noticed her stage fright (that would ultimately mark her behavior on film sets throughout her career); the director assigned him to spend hours gently coaxing and comforting Monroe as she prepared to film her scenes.
Much of the critical commentary following the release of the film focused on Monroe's overtly sexual performance, and a scene which shows Monroe (from the back) making a long walk toward Niagara Falls received frequent note in reviews. After seeing the film, Constance Bennett reportedly quipped, "There's a broad with her future behind her." Whitey Snyder also commented that it was during preparation for this film, after much experimentation, that Monroe achieved "the look, and we used that look for several pictures in a row ... the look was established."