She had been cast as Mary, a sixth Nexus-6 replicant that escapes from "off-world" and comes to Earth, but budget constraints resulted in her part being cut from the film early in the period of principal photography.
Nelkin has made guest appearances in several TV series, including The Paper Chase, The Waltons, CHiPs, The A-Team, Eight Is Enough, 1st & Ten and Hunter.
[5] In February 2016, Nelkin began treating dually diagnosed individuals with mental health and substance abuse issues through the Office of Alcoholism and Substance Abuse Services Program (OASAS), since serving as an intake and CASAC counselor at The Bridge,[5] a New York-based $65 million agency that provides housing and behavioral health services to 4,000 New Yorkers annually.
[8] According to Nelkin, Woody Allen's film Manhattan (1979) was based on her romantic relationship with the director, whom she met when she was 16 on the set of Annie Hall.
Her bit part in that film ended up being cut, and their relationship began when she was 17 years old and a student at New York's Stuyvesant High School, and Allen was 42.