Collins, 81, opened up about the incident that happened when she was only 17 in an interview for the Cecilia Peck-directed documentary "Brave Miss World."
"I was raped when I was 17 years old," the actress said in the film. She then detailed how it happened during a date with Reed, who was 14 years older than her. Collins said Reed gave her a rum and coke and something to read.
Collins was surprised by the content of the reading materials, according to Mirror. "The books were porn, which I'd never seen before," she said. "Hardcore porn."
"The next thing I knew, I was out flat on the sofa in that living room and he was raping me," Collins recalled.
She then explained that she was drugged, saying: "What he had given me was a drug. He had drugged my drink. It was what is called in those days a Mickey Finn. Which I think today would be Rohypnol."
Collins said she felt guilty about what happened, according to Page Six. She then revealed that Reed asked her again out on a date and a few months later asked for her hand in marriage.
"It wasn't my fault but I didn't know, I went out with him. And maybe I shouldn't have gone out with him," she said. "He was much older than me, and he was a famous star."
She continued, "And anyway the bottom line is that he called me, and I went out with him again. And after I'd been going out with him for a few months, he asked me to marry him."
Collins agreed to marry Reed because he took her virginity. She was miserable during their marriage and eventually divorced him after four years.
"I really hated him, but I was so filled with guilt, that he had done this thing to me," she explained.
Collins' was interviewed for the documentary by Miss World 1998 Linor Abargil, who was raped six weeks before the pageant. "Brave Miss World" is aimed to encourage victims of sexual assault to speak out about their experiences.