It was 2003, and Kimmel’s show wasn’t the mega-ratings driver it is today.

So, at the end of the night, Kimmel took a chance one that would change everything.

“We had a bad show.

Matt Damon and Jimmy Kimmel at a Red Sox game

The guests were bad, and I was feeling pretty bad about myself at the end of the program.

We ran out of time,'” Kimmel toldNPRin 2013.

Wanting to pick a celebrity they would not bump, Kimmel chose Damon.

Kimmel and Damon awards show

Even Kimmel can’t believe the joke’s longevity.

At this point, the pair hadn’t even met.

“Maybe I had a movie out that week,” Damon guessed during a SiriusXM interview, perYoutube.

“It changed the course of both of our lives,” Damon said.

We’ve kept this feud going for, you know, it’s gotta be 15 years now.

We’ve had a lot of fun doing it."

As their so-called feud grew, the pair even brought their friends and partners into the fun.