The top view of the whole town is used in Pretty Little Liars (2010), Witches of East End (2013), The Carrie Diaries (2013), Gilmore Girls (2000), Bitten, and Hart of Dixie (2011). The set itself is used on Pretty Little Liars, Gilmore Girls, and Hart of Dixie.

Camila Mendes admitted in an interview that she knew her co-star Cole Sprouse from her college years. They both attended the NYU. Camila said that they had exchanged a few words, but that Cole did not remember her.

K.J. Apa said that for all the scenes where he's eating junk food with his friends at a diner and eating burgers, he has a bucket just off camera where he spits out all the food after taking a bite for the camera shot. This is because while filming the show, he's on a very strict diet to maintain his six-pack abs for his shirtless scenes. Apa said that to make up for it, he eats what he wants in the break between filming two seasons of the show.

The final seasons of Pretty Little Liars (2010) and Teen Wolf (2011) pushed Riverdale to be greenlit.

This marks Cole Sprouse's return to acting after a brief hiatus to pursue a degree in archaeology at NYU. This is also his first role since Piper's Picks TV: Debby Ryan Interview Suite Life on Deck Meets Tween Hollywood Reporter Piper Reese (2010).

Camila Mendes used Blair Waldorf from Gossip Girl (2007) as inspiration, and channels Summer Roberts from The O.C. (2003) for her 'humorous' moments.

Cole Sprouse originally wanted to audition for the role of Archie, but he ended up liking Jughead's character better.

In this series Jughead wears a pronged beanie as an updated version of the whoopee cap the character traditionally wears in the comics. The whoopee cap was a popular hat for kids of the early 20th century, made by cutting a fedora into a crown-like shape.

During the first season, there are many 75th annual events happening in the town of Riverdale, such as the 75th Annual Variety Show and the 75th Anniversary Jubilee. In 1941, 75 years ago, the characters Archie, Betty, and Veronica were created and introduced in Pep Comics #22.

Both Cole Sprouse and K.J. Apa dyed their hair for their roles.

K.J. Apa is from New Zealand, but spoke with an American accent while filming Riverdale.

Cole Sprouse had just finished binge-watching The Twilight Zone when he auditioned, which inspired him to read his character's narration in the style of Rod Serling.

Madelaine Petsch was brought in to audition for Betty, even though the casting directors knew they wanted her for Cheryl all along.

A billboard reads: "Welcome To Riverdale: The Town With Pep!". Archie made his debut in Pep Comics #22 (December 1941).

Ashleigh Murray only had $12 in her bank account when she got the role of Josie.

The producers originally pitched the show as a movie. Studio executives were wary but they loved the characters so much that producer Robert Aguirre-Sacasa decided to make it into a TV series.

The Latin motto on the gate of the Blossom family estate is "radices currere abyssi", or in English, "roots run deep".

Series creator Roberto Aguirre-Sacasa is also the chief creative officer of Archie Comics.

K.J. Apa (Archie) can actually play the guitar

All episodes except The Wicked and The Divine, The Tell-Tale Heart and The Noose Tightens are titled after famous movies.

The show is based on characters from "Archie", a long-running line of comedy-themed comic books first appearing in 1939 and aimed at teen readers, which was created by publisher John L. Goldwater and artist Bob Montana and published by Archie Comics Publications.

The series was originally going to be on FOX but was moved to The CW instead; that network has adapted several comic books into TV series.

In the comics the town of Riverdale is actually based on the small town of Hiawatha, KS, "The City of Beautiful Maples."

It was announced that Ross Butler would be departing the series after Season 1 due to other project commitments, with the role having to be recast for Season 2. It was announced a day after the Season 1 finale that Charles Melton would be Ross Bulter's successor.

In one scene Jughead says Archie is acting like a superhero and should have a superhero name, "like Pureheart the Powerful". In the comics there's a "spinoff" where all Archie comic characters ARE superheroes; and Archie's superhero is Pureheart the Powerful.

The diner in this show is the same one as in Horns (2013).

In Season 1 Episode 10, Jughead indicates he'd rather not be in the middle of a "Seth Rogen movie". This may be a reference to Seth Rogen attending Point Grey Secondary School in his youth, where many scenes of "Riverdale" are filmed.

The diner in this series (Rocko's Diner in real life) is the same one used in Percy Jackson & The Lightning Thief (2010) and in Horns (2013).

Skeet Ulrich, who plays Jughead's father, went to NYU. Cole Sprouse, who plays Jughead, also went to NYU.

K.J. Apa said that he does not mind being shirtless and showing off his abs on the show because that is how the character is written in the script. He said, "Someone has to have abs on the show. It's always strange to play a sex object. But when I read the script, it was how they were taking it. So I was prepared for that, and I knew that people were going to take it like that as well. But yeah, it is strange. I don't think it's anything I'm ever going to get used to. As soon as you get used to becoming a sex object, that can be dangerous. When people look at you as a sex object, that's not how you're defined. There's more to Archie than abs and his body and getting with girls. He's a humanized character, and people should see past that, but initially, at first glance, people are going to have that first impression of sex object."

Marisol Nichols and Cole Sprouse appeared in the TV series Friends (1994).

Both Marisol Nichols and Ross Butler have guest starred on MTV's Teen Wolf (2011).

"Riverdale" is shot in the area of Vancouver, B.C., Canada So was Josie and the Pussycats (2001).

This is not the first time Archie's comics have been put on screen. A previous attempt to do so was unsuccessful.

Both K.J. Apa and Ross Butler auditioned for roles in Power Rangers (2017), but neither was cast.

Luke Perry has acted alongside two Audrey Griswolds: Marisol Nichols (from Vegas Vacation (1997)) in this series, and Dana Barron (from National Lampoon's Vacation (1983)) in Beverly Hills, 90210 (1990).

The Frank Hurt football team, from the high school Frank Hirt Secondary in Surrey, plays as Archie's football team.

Though shown as a tough biker gang, the "South Side Serpents" were originally a gang of small thugs led by Fangs Fogarty in the "Li'l Archie" comics in 1950-60 mainly. Their T-shirt represented a snake forming an "S" symbol, which is found on the bikers' leather jackets and tattoos. "Serpent" is also the French translation for "snake".

All the episodes of Season 1, with the exception of chapters 5 & 11, "Heart of Darkness " and "Return to Riverdale", are movie titles. One dates back as far as 1937. This is "La Grande Illusion" "Heart of Darkness", by author Joseph Conrad and published in 1899, was used as the basis for "Apocalypse Now".

Betty's mother, played by Mädchen Amick, serves up cherry pie at home. Amick previously appeared on Twin Peaks (1990), in which cherry pie was frequently served.

Lochlyn Monroe and Marisol Nichols both appeared in "Charmed". Monroe played Prue's love interest in Season 2 and Nichols played Chris' girlfriend from the future, Bianca. Madchen Amick starred in "Witches of East End", another show about witches.

Lochlyn Munro and Luke Perry both played a love interest for Shannen Doherty.

Mädchen Amick, Mark Consuelos and Charles Melton all appeared in American Horror Story.

Lochlyn Munro and Mädchen Amick were both guest stars on Netflix's Longmire (2012).

Luke Perry and Marisol Nichols were both guest stars on CBS' Criminal Minds (2005).

In the comics, Jughead's dog is also named Hot Dog (which the serpents call their dog at the end of the finale in season one).

Both Jughead and Veronica uses movie terms.

Two episodes refer "Montreal" in the series where Hiram Lodge made probable shady deals leading to his imprisonment. Though it is a reference to Canada, where the series is shot, Montreal (or rather the South Shore suburb of St-Lambert) is the home of Heritage, which translated Archie comic books in French for many years until recently.

Even though the show is shot near Vancouver, Canada; the aerial shot of the town is actually from Harbor Springs, Michigan, USA. The church at the end of the street is called "The Holy Childhood Church of Jesus" . Population is just 1,200.

During the Season 1 finale, Archie was using his fist to break the ice to save Cheryl, who was underwater. K.J. Apa, who plays Archie, broke his hand filming this scene.

Different endings were filmed for Episode 12 (where we find out who killed Jason) in order to confuse the cast, and to make sure the secret didn't get out.

Despite appearing in nine episodes, Trevor Stines, who plays Jason Blossom, has never had any spoken dialogue.

Cole Sprouse originally auditioned for Archie, but asked to read for Jughead when he found out he was the narrator, meaning that he can't be killed off.

While their apparent mutual feelings for each other may seem odd to casual viewers, the concept of the famously asexual Jughead showing a romantic interest in Betty dates back years ago to the comics when the two were often seen together. Betty would occasionally flirt with Jughead, and Jughead would even admit that if he were to ever show any female romantic interest, it would be her.

Sabrina the Teenage Witch was originally going to appear in the Season 1 finale, but was taken out because there was so much going on in the episode already. A "Sabrina the Teenage Witch" TV show has been ordered by the CW however it got moved to Netflix as it got a automatically Two Season Order.

Skeet Ulrich, who appeared in Scream (1996), plays Jugheads's father. Lochlyn Munro, who appeared in the subsequent Scream parody Scary Movie (2000), plays Betty's father. Marisol Nichols, who appeared in Scream 2 (1997), plays Veronica's mother.

In the episode where Archie and Betty organize Jughead party, Veronica congrats him in Spanish saying "Feliz Cumpleaños Torombolo" Wich is the name given to the character in all Latin America, "Torombolo" is a widely known slang adjective used to describe clumsy and sloppy people thanks to Archie comics.