Asked if she's looking to date a man or woman, the actress, 51, replied, "Definitely a woman."
The twice-divorced mother of two daughters – her movies also include 1985's Witness, with Harrison Ford, and 1988's The Accused, with Jodie Foster – said she's "done with the man thing. I did that. I need to move on in life. It's a part of being true to yourself. That's been a challenge for me."
The difficulty of coming out as a lesbian led to "an ongoing process from the time I was probably 12. I had a lot of things happen that convinced me that God was punishing me because I was gay," said McGillis, who in 1982 was assaulted by an escaped rapist who had gotten into her apartment.
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"Whenever I get an offer, they ask me to dye my hair," she says. "And I just won't."