These days, Hemingway and her boyfriend Bobby Williams have a lifestyle company called TheWillingWay ("He has the 'will,' I have the 'way,' " Hemingway said). Health and wellness are her passion.

She also advocates for suicide and mental illness awareness. She is open and communicative with her two daughters about their own mental health, too.

"I think people need to talk about it a lot," she said of mental illness, "Making it OK that it's in your family." She added, "It doesn't shame anyone, and it doesn't make anybody's family an ugly, bad family."

That is a challenge to which this Sundance film also rises.