Resnik was born and raised in New York, New York. She is the daughter of Richard and Elise Resnik. Her father is a corporate and real estate attorney and her paternal grandfather was a Jewish immigrant from Russia who sold pianos including the prop pianos featured in the 1967 film The Producers.
Resnik was the creator, showrunner, and executive producer, along with writer and producer Dana Fox, of Home Before Dark, a Paramount series for Apple TV+ inspired by real-life 12-year-old crime reporter Hilde Lysiak. The mysterydrama series focuses on the experiences of a young woman returning to "the small lakeside town her father left behind."
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Resnik is currently showrunning The Horror of Dolores Roach for Amazon.
Resnik is a faculty member of the Peter Stark Producing Program and the John Wells Division of Writing for Screen & Television at the University of Southern California and also teaches at the Sundance Institute Labs program.[11]
Resnik is a single mom. She lives in Los Angeles with her daughter. Resnik participated in the LA Marathon and is involved at IKAR, a Los Angeles-based progressive Jewish congregation.[13]