Jessica Simpson opens up about her secret romance with a “massive movie star.”

“Movie Star: They Always Say They’re Single,” a short story by Jessica Simpson, is now available on Amazon. The project is based on an encounter Simpson had with an unidentified actor she “grew up thinking was so hot.”

It all started, Jessica Simpson says, when she was five days away from reuniting with fellow singer Nick Lachey, whom she eventually married.

It was early September 2001, according to her story, and Simpson “had spent that summer apart from my first real boyfriend, Nick, and I still didn’t know how to be single.”

She was at an after-party for the 2001 MTV Video Music Awards when the actor, whom she refers to as Movie Star, approached her and “eyeballed” her up and down, “as if he was undressing me with his eyes…”

The then-21-year-old singer claimed she obtained his phone number, never called him, later ran into him and discussed possibly doing a music video together, which never happened, and the two lost touch after she and Lachey reconciled and married.

They divorced in 2006, and a producer later told her, “I have somebody who’s been after you for a long time, and you don’t even know it,” referring to the Movie Star.

Simpson claims they first kissed at the Beverly Hills Hotel while he was getting ready for an awards show.

“Throughout the awards show, he texted me,” she writes. “The event was so large that I felt special because every beautiful woman in Hollywood was there, and he wanted me.”

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But, surprise, “there was another beautiful woman in his life: his girlfriend.”

“I saw a photo of Movie Star on a red carpet with her shortly after,” Simpson explained. “I was never going to be the other woman in a million years.”

The unnamed actor continued to pursue her after telling her that he and his girlfriend had broken up and were only being photographed together to keep the news of the split from getting out.

She even invited her to come see him while he was filming, but they had to take separate cars to the hotel, where they had rooms on different floors, and she was told to use the fire escape to get to his room.

Simpson later realized that the actor was attempting to “hide me from his chick.”

They did not have sex, according to her, and she ended things on her terms, but she did get something to remember him by.

“I needed a trophy for this accomplishment, so I took his pillowcase,” she wrote. “I didn’t mind if it was creepy or whether he had to pay for it… and it would convey the message: “I had a good time, but now I have a memory of you.”