Fast-forward 15 years: The actor's turning a version of that story into a 100-minute live film, with shooting to begin at 2 a.m. local time in 14 London locations, with a cast of 30, including Owen Wilson and Willie Nelson -- all of which sounds like a production nightmare. Vanity Fair even published a hysterical video of them roasting him for it and calling it a terrible idea. Here's what a few celebrities think of Harrelson's film:
Jimmy Kimmel: "You don't have to eat pot. You can just smoke it."
Justin Timberlake: "As he shoots it? That's fucking stupid."
Jennifer Lawrence: "Woody, you've had so many bad ideas, but this is by far the worst one."
Ted Danson: "I think it's a fant -- [cracks up laughing] -- fantastic idea -- [cracks up laughing]."
Matthew McConaughey: "Look, whatever you're into. I understand you've bitten off more than you can chew. That's not the 34th time you've done that."
Woody Harrelson, to EW: "It might be accurate to call this insanity."
Imagine the timeline where Harrelson pulls it off, though. This is either going to be an unwatchable disaster or the highest of art. To catch Lost in London tonight, tickets to the theatrical live streams are available at Fandango.