It turns out the restaurant where Archie and the gang have shared many a milkshake was also used in the 2013 fantasy flick, Horns.
In the movie, Daniel Radcliffe (AKA Harry freaking Potter) can be seen sitting in the diner that looks EXACTLY the same by the time it relocates to the dark AF town of Riverdale four years later.
Hm, we wonder if they changed the ketchup and mustard in all that time, 'cos if not that's grooooooooss.
Sharing sets is a common practice in Hollywood, loads of TV series' like iCarly, Hannah Montana, Pretty Little Liars, Glee, That's So Raven, Drake & Josh, Desperate Housewives and Charmed have borrowed their sets from other shows.
We're glad that the ol' diner went to a good home!