Kim Kardashian spills the beans on how she got into Marilyn Monroe’s famous gown at the Met Gala.

Kim Kardashian claimed on the Met Gala red carpet that she needed to shed 16 pounds and that she would wear a sauna suit twice a day while dying her hair platinum blonde, which took her 14 hours.

Kim Kardashian has spilled the beans on how she was able to wear Marilyn Monroe’s legendary gown from 1962 to Monday night’s Met Gala in New York.

The 41-year-old TV personality went to great efforts to get into the show-stopping crystal gown that she borrowed from the Ripley’s Believe It or Not! museum.

Kim stated on the red carpet that she went on a crash diet to reduce 16 pounds in three weeks and that the museum sent ‘armed guards and gloves’ when she initially tried on the outfit.

Monroe wore the outfit during her iconic Happy Birthday to US President John F Kennedy performance in 1962.

It made history in 2016 when it sold at $4.8 million, making it the most expensive dress ever sold during an audition.

More than 6,000 crystals were hand-sewn into the gown by costumier Jean Louis.

Kim revealed that she had to lose 16 pounds and spend 14 hours dying her hair platinum blonde to match Marilyn’s.

On the red carpet, she told Vogue, “I had this idea to try it on and then they came with armed guards and gloves.”

“I’ve always thought she had a lot of curves. I envisioned myself to be smaller in some places where she was larger and larger in other places. As a result, when it didn’t fit, I wanted to cry because it couldn’t be altered in any way.

“It didn’t fit me when I tried it on. ‘Give me three weeks,’ I said. I needed to shed 16 pounds.”

Kim claimed she would use a sauna suit twice a day, run on the treadmill, and cut off all sweets and carbs for three weeks to help her do this.

The reality star said she ate just the “cleanest vegetables and protein” because she was desperate to lose weight, but admitted it was “difficult.”

Kim only wore the gown for a few minutes on the red carpet before changing into a copy as she reached the top of the museum’s stairwell.

She arrived at a small fitting room with a conservator from Ripley’s museum on hand with white gloves after leaving her hotel in a dressing robe accompanied by security.

The reality personality acknowledged the dress’s history and claimed she couldn’t risk sitting, eating, or wearing her regular body make-up in it.

Kim explained that she had to rehearse walking up the stairs and that everything had to be ‘exactly timed’ to keep the garment in peak shape.

Kim captioned photos of the gown on Instagram: “I’m ecstatic to be wearing the historic dress worn by Marilyn Monroe to sing Happy Birthday to President John F. Kennedy in 1962.