'The Hangover' at 15: Here are 15 things you may not know about the comedy

“I think that’s why (Caesars Palace) let us film here,” he told us during that same interview. “Because I lost $55,000 on night one.”

5. Mike Tyson was not in a healthy place while filming his scenes. “Somebody had told me something about a movie, but I wasn’t coherent as to what he was talking about,” Tyson told the Hollywood Reporter in 2013. “They made it sound like it was low-budget, not a serious movie.”

Then he encountered Galifianakis and Justin Bartha, who played the missing groom, Doug, at Nick Cannon’s birthday party at Pure, the Caesars Palace nightclub now known as Omnia. Tyson had no idea who they were.

“They said, ‘We’re going to be shooting a movie with you in two weeks,’ ” Tyson recalled. “I didn’t even know. I said, ‘Really?’ And I started drinking with them. I was a little wasted at the time. I still didn’t understand the movie until like a week and a half later, when I was on set with these guys.”

During an interview with Yahoo Sports in 2012, Tyson said he was high when filming his scenes. “They had to know I was messed up,” he said of his co-stars. “I couldn’t talk. I had the cocaine talk.”

Later, when he was swarmed by a group of children asking him about the movie, the encounter made him want to get sober.

“That changed everything for me, which I’m so appreciative,” Tyson told ABC News in 2012. “That was just some good stuff.”

6. Four tigers were trained to perform specific tasks on screen. The Jim Henson Creature Shop supplied a life-size animatronic tiger, which contained 30 servo motors and required two puppeteers to operate, for certain scenes.

7. The Best Little Chapel, where Stu (Ed Helms) married Jade (Heather Graham), was just a facade built in the parking lot of what’s now known as the Bungalows Hostel, 1236 Las Vegas Blvd. South.

8. You can, however, get married in a replica of the Best Little Chapel at Madame Tussauds Las Vegas. Packages include wax figures of Phil and Alan as witnesses, as well as a chance to hang out in the attraction’s “Hangover” hotel room, and range from $2,500 to $10,000.

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