Kristin Cavallari is putting an A-lister on blast for exposing himself to her on a date.

The “Hills” alum went out twice “with a very famous man … maybe four years ago” — first at the Sunset Tower Hotel, then at the Beverly Hills Hotel.

“[They were] two really great dates, honestly two of the best dates of my life,” the reality star, 39, recalled on her “Let’s Be Honest” podcast Tuesday.

She described how they “got a suite, swam all day, took showers separately and ate dinner on the patio” for their second date.

The “Laguna Beach” alum recalled the mystery man then bringing up “those insecurities about your body [that] you just want to get over with … when you first start dating somebody.”

At the time, the guy said, “I have a mole on my d–k. It’s not, like, that bad, but it’s noticeable. Can I just show it to you?”

“So he pulls out his d–k, first time I’ve seen it. I don’t see anything. I think he said [the mark] was more flesh-colored, like a white mole,” Cavallari recalled before assuring that she “didn’t do anything with that d–k that was in my face.”

She later decided “that’s what he tells every f–king girl to get his d–k out” because “once your d–k is out, it’s pretty common to” get intimate.

“Put it away, f–king weirdo,” Cavallari quipped. “You know that’s what he does.”

The Uncommon James creator added, “This is mean, but I think he’s kind of known for having a big d–k and it wasn’t that big, and I think that’s what the insecurity was really about.”

She continued, “Can I be honest with you? Changing out of his swimsuit, he had the flattest ass and horrible bacne scars. We’ve got bigger fish to fry, buddy. [That’s] one of the biggest f–king turnoffs.”

That date was “the last time [Cavallari] ever saw” the individual — and she is “so glad” she didn’t do more than “make out” with him.

She called the man “bad news,” claiming she “couldn’t have dodged a bigger bullet” because he later revealed himself to be a “full-blown f–king narcissist” who “wanted to control” her.

Cavallari did not name the celebrity since she doesn’t “want anyone to be able to pinpoint who this could be” — and insisted it’s a person she’s “never said publicly” while sharing her dating history.

“This [story] is a few years old, but this is one I’ve never told before,” she noted. “It’s a good one.”

Cavallari often opens up about her love life to her listeners, from describing a “hot” Tyler Cameron hookup to name-dropping an NHL fling — and Chelsea Handler similarly spilled the tea on last week’s episode.

The comedian, 51, put chef Bobby Flay on blast for being a “cheap” date and reflected on the end of her “adventure” with her latest “cowboy” boyfriend.