People.com said Bertinelli made the remarks on the pre-taped Feb. 25 episode of "The Oprah Winfrey Show." She is promoting her new book, "Losing It: And Gaining My Life Back One Pound at a Time."
"I went up to read for 'Raiders of the Lost Ark,' which I was so wrong for," People.com said Bertinelli recalled on the show. "And the next day I got a call and some flowers ... (Spielberg) asked me out. We went out a few times ... And did more."
Asked for why she has decided to divulge such personal details at this stage of her life and career, she said: "I just figured, if they're going to watch me lose 40 pounds and I'm going to be embarrassed that way, and there's going to be fat-ass pictures of me with my butt hanging out in Hawaii, I thought, 'Why not let the inner me out, too?' Because the inner me is, I hope, prettier than the outer me."
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