What actor/actress was in these movies?

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The first pic is Monroe in How To Marry a Millionare. The second two are cheapy Horror flicks. The person from the HTMAM cast who ended his career in a lot of disposable genre junk is Cameron Mitchell.

I'd guess him, not knowing or caring what the sh!tty Horror flicks are.
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"Film is a disease. When it infects your bloodstream it takes over as the number one hormone. It bosses the enzymes, directs the pineal gland, plays Iago to your psyche. As with heroin, the antidote to Film is more Film." - Frank Capra



I recognize some of the actors, but don’t know which movies.
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I’m here only on Mondays, Wednesdays & Fridays. That’s why I’m here now.



Kate Hepburn in Adam's Rib + Jimmy Stewart and Wendell Corey in Carbine Williams + Lana Turner in Life of Her Own + Turner and Tom Hernández in Latin Lovers =
Jean Hagen




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The haircut tells me that the Natalie Portman shot is from V for Vendetta, a movie I shut off after 20 minutes and the middle shot appears to be from Michael Collins and the common actor between those movies appears to be Stephen Rea?