(PEOPLE.com) -- Rosie O'Donnell was attracted to Michelle Rounds the moment she saw her in a Starbucks this summer. But she never thought it would be reciprocated. "I thought she was a 28-year-old heterosexual girl, because that's what she looked like to me. And she's a 40-year-old gay woman," O'Donnell, 49, tells ABC's "Nightline" in an interview airing Monday night. She adds with a laugh: "My gaydar was way off!" RELATED: Rosie O'Donnell: 'I've Stopped Being So Angry' But O'Donnell, who recently said she's in love, thinks maybe it's a good thing she thought Rounds was straight. "I think if I had known that she was gay, I wouldn't have been brave enough to talk to her," she says. O'Donnell's new nightly talk show, "The Rosie Show," debuts Monday on the OWN network. See full article at PEOPLE.com. © 2011 People and Time Inc. All rights reserved.
O'Donnell recently said she's in love . O'Donnell was attracted to Rounds the moment she saw her in a Starbucks . Her new nightly talk show, "The Rosie Show," debuts Monday on the OWN network .