It turns out that years ago, Harmony Korine was banned from The Late Show for messing with a very famous Oscar winner.
So what exactly went down?
"The legend is that he pushed Meryl Streep backstage," Franco said to Letterman of Korine's ban. "I mean, if you push Meryl Streep backstage, you get kicked off."
"Not necessarily," Letterman joked.
"We checked it," the 34-year-old actor said. "In the books, she was there that night. They were both there."
"Is that what he told you happened?" Letterman asked.
"He did tell me that," continued Franco. "But he said he was a little out of it so maybe he doesn't remember...I think he had a period where he was going a little off the rails. So maybe he was on something that night. My guess is he was on something that night."
Letterman then dished on the real reason he banned Korine from his show. "I went up to greet Meryl Streep," he said, adding, "She was not in there. And I looked around and found your friend Harmony going through her purse. True story. True story. And so I said, ‘OK, put her things back in her bag and then you get out of here.'" (The host later added he would be "more than happy" to have Korine back on the show.)
And there you have it: Don't mess with Meryl!