Matt LeBlanc is turning 48 today, July 25. Here are five things about Joey Tribbiani and the rest of the cast of “Friends,” which you might not already know.*

1. The frame around the peephole was originally supposed to have a picture, but the glass was accidentally broken.

Original set decorator for the show, Greg Grande, told The Huffington Post that he bought the frame from the Rose Bowl Swap Meet and initially dressed it into the set as a normal picture holder that sat on a table.

“I originally had it as a picture frame that had a back on it,” he said. “And while we were dressing the glass in it broke and I told one of the guys, ‘Well let’s see what that frame looks like around the peephole.’ And they put it up there for me and that’s where it lived for the next 10 years. It actually was as simple as that. Kind of a funny mistake.”

The idea might have come from the show’s art director (or today’s equivalent, production designer) John Shaffner pushing for Grande to do something special with the door. Shaffner really doesn’t like when doors in sitcoms are lackluster. “It’s one of my pet peeves,” he told HuffPost, “especially in sitcoms in New York, what’s on the back on the door.”

So before the break of the frame, Shaffner had been telling Grande, “Come on, Greg, what are we going to do with the back of the door? What are we going to do with the back of the door?” Then Grande had the broken frame and figured he might as well try it out.

2. Jennifer Aniston and other cast members were scared of LeBlanc before meeting him, just based on reading his character’s forward personality.

According to a 1995 article in , in your phone’s contacts.

3. Text “POP” to that number via your WhatsApp account.

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