The Misfits: A finale for both Gable & Monroe (1961)

While the "finale" in the original article title refers to the fact that this was Clark Gable's last movie -- he died just 12 days after filming of The Misfits ended -- looking back, we can see that the phrasing was oddly (and sadly) prescient: Time would eventually reveal that this was Marilyn Monroe's final film role, too.