Isaac Mizrahi fondly recalls his first encounter with Timothée Chalamet on the set of “Marty Supreme,” describing the experience as incredibly exciting.

“I felt a bit anxious,” Mizrahi admitted, “because you can never be sure how these meetings will go. But he turned out to be wonderful.”

The 64-year-old designer was pleasantly surprised when Chalamet, known for his role in “Dune,” requested a selfie with him.

“It was surreal,” Mizrahi shared with Page Six earlier this week at the New York Film Critics Circle Awards. “He’s truly a dreamboat.”

“It was just crazy,” he gushed to Page Six exclusively earlier this week at the New York Film Critics Circle Awards. “He is such a dreamboat.”

Mizrahi, who plays a publicist for Gwyneth Paltrow’s character in the critical hit, shared that he got the part in an unconventional way.

“I’ve known Josh Safdie (the movie’s co-writer and director) since he was a little boy,” the Xcel designer explained.

“He was my downstairs neighbor’s son’s best friend. So, I saw him at Seders and parties and things as a little boy … I’ve known him for years.”

Meanwhile, the “Project Runway All Stars” alum is getting ready for his annual run of shows at the Café Carlyle.

The new show, called “A.I. Artificial Isaac,” will run from February 3 to February 21.

“It’s my 10th year anniversary at the club,” he explained, “and I’m going to talk about what it feels like to be, you know, 10 years older — which is s—tty, basically! It feels s—tty, so come on down!”

Mizrahi added that he’ll discuss how “the passage of time feels so incredibly more and more poignant,” which is why he despises celebrating milestones.

“I hate birthdays,” he announced. “I hate anniversaries. I hate anything that kind of marks that passage of time.”

The other things Mizrahi hates about aging are more practical.

“Just standing up!” he said. “What about going up the stairs, and what about coming down the stairs? Coming down the stairs … literally, you have to think about it three or four times before you actually do it.”

Other celebs at the event included winners Rose Byrne, Amy Madigan, Benicio del Toro and Safdie, who accepted Best Screenplay with his writing partner, Ronald Bronstein.