Fortner, who has one of the world's largest private collections of Monroe's personal property, says the late actress wanted the dress to be one that was unique to her. "When Marilyn knew she'd be performing at President John F. Kennedy's birthday gala she contacted Luis and said, 'I want you to design a truly historical dress, a dazzling dress that's one of a kind.' She asked that it be a dress that, 'only Marilyn Monroe could wear,' " Fortner tells PEOPLE.
"Marilyn stood nude as the fabric for the dress was literally sculpted to her body to precisely match every curve. The fabric, which is a flesh-colored soufflé gauze imported from France, was layered strategically so she wouldn't need to wear undergarments," he continues.
Fortner says that Monroe's dress "fit her perfectly. The gown worn by anyone else will not be a precise fit. In this case, Kim Kardashian's measurements are somewhat different than Marilyn's. It's logically assumed the fabric and seams were stressed."
Fortner, who witnessed Ripley's Believe It or Not! buy the dress for $4.81 million in 2016, notes that "the age of the gown" is also an "issue" as Monroe wore it in May 1962, making the piece 60 years old.
He goes on to address speculation that the Keeping Up with the Kardashians alum didn't actually fit the gown on Monday night.
"Your emotional state is not my responsibility." – Warren Smith

You can tell it didn't fit her (Kim). When you look at Marilyn in the dress while she was walking out onto the stage, giggling, the light shining on her and through the dress, you can tell that dress fit her absolutely perfectly. On Kim, it looks just,…..wrong. It doesn't work.
"Your emotional state is not my responsibility." – Warren Smith

Money can buy you anything and everything in the supermaterialistic world in which we live.

I can't believe they gave her the actual, original dress. Why didn't she just get one of her designer friends to commission a replica? Unbelievable. That dress is a piece of history. How the hell did she ever get her hands on that? Wasn't that bid on at Sotheby's or something and privately owned?
No one ever should have granted her access to such an iconic and original piece of history. Marilyn wore that dress in 1962 and as far as I know, it hasn't even been touched since. So how the hell did Kartrashian get her slimy paws on it, and why?
How irresponsible.
"Your emotional state is not my responsibility." – Warren Smith

My sister's started watching their show. Gosh…

Bad idea. Kim's exaggerated curves are completely different than Marilyn's curvy but well-proportioned figure.

Lmao it looks like she's hiding it. I just watched a video and she said she had to lose 16 pounds just to fit into the dress.

So many photographers taking pics of her ass!

She looked good