On the Gorgeous 1950s and '60s Movie Star, Maggie McNamara

 

She burst on to the scene in 1953 (the same year that Audrey Hepburn emerged) with an Oscar nomination for Otto Preminger's "The Moon Is Blue", proceeded to make a handful of other films (including the classic, "Three Coins In the Fountain") and television guest appearances, and then suddenly in 1964 jilted the industry entirely. Unfortunately what happened after this is still a little sketchy.  From what I can gather she spiraled out of control struggling to make ends meet as typist in New York City, suffered through some hard-core episodes of mental illness, and ultimately committed suicide in 1978 (a lethal mixture of tranquilizers and secobarbital) a couple months shy of her 50th birthday. An all-too familiar story among celebrities, in other words.