A Screenwriting Fellow of the American Film Institute, Greer is a screenwriter and director who began in the theatre, where she developed her ear for dialogue and character. Centering marginalized figures through genre and re-interpreting film history through a modern critical lens is a cornerstone of her creative work, and she has worked with the Film Noir Foundation and NoirCon to present a feminist perspective on classic film and filmmakers. 

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Her writing on film and culture is published in Vanity Fair and Air Mail Weekly.