Nina Dobrev (Elena), Paul Wesley (Stefan) and Ian Somerhalder (Damon) are the only actors in the staff who get paid $40,000 per episode.
Zach Roerig, Michael Trevino and Paul Wesley originally auditioned to play Damon before landing their respective roles.
All episodes in Season 6 are the names of 90s songs. The exception being the episodes, "Bird In A Guilded Cage", "I Never Could Love Like That","I'll Wed You in the Golden Summer Time","I'm Thinking Of You All The While" were song titles from the year 1903.
Nina Dobrev is six months younger than Steven R. McQueen while her character is two years older than his character.
Joseph Morgan (Klaus) married Persia White (Abby) who is 9 years older than him. They met while on the set.
As of 2016, The Vampire Diaries officially becomes the longest running vampire show beating Buffy the Vampire Slayer and True Blood which both ended after 7 seasons.
Ian Somerholder is actually 10 years older than Nina Dobrev, whereas Paul Wesley is only 6 years older in real life.
In the Vampire Diaries book series, Elena's best friend Meredith Sulez plays a big role in the epic story, but she obviously doesn't exist in the show.
According to Julie Plec The Vampire Diaries' end date depends on Paul Wesley and Ian Somerhalder Julie Plec: "I finally realized that my destiny on this show, creatively, is tied in to Ian Somerhalder and Paul Wesley. And I mean that in a really good way. As long as those boys who I now consider my friends want to keep telling the story, then I won't walk away from telling the story."
Claire Holt (Rebekah) was cast by Kevin Williamson after she had auditioned for a role in his other series The Secret Circle (2011).
Candice King (Caroline Forbes) and Steven R. McQueen (Jeremy Gilbert) dated in real life.
Claire Holt (Rebekah) and Phoebe Tonkin (Hayley) previously worked together on another fantasy series, H2O: Just Add Water (2006).
Alexandra Chando auditioned four times for the role of "Elena Gilbert". She later went to get the role of Tara in the final season.
Stephen Amell (Brady) previously auditioned for the roles of Mason Lockwood and Elijah.
There is a spinoff of The Vampire Diaries called "The Originals," which is about The Original siblings (Klaus, Elijah, and Rebekah,) and takes place in New Orleans.
Torrey DeVitto (Meredith Fell) previously auditioned for the role of Elena Gilbert.
In season 8 ep1, Damon is reading Fifty shades of Grey, a role Ian Somerhalder was up for.
Vampire Diaries' last episode aired on the same day that Buffy the Vampire Slayer had premiered 20 years ago, to the very day.
The pilot was shot in Vancouver but production of the series was moved to Georgia because of the state's tax credit incentives. Most of the filming takes place in the city of Covington.
Nathaniel Buzolic (Kol Mikaelson) previously auditioned for the role of Stefan Salvatore.
Torrey DeVitto (Dr. Meredith Fell) is Paul Wesley's ex-wife, they worked together during season 3 and 4 (2011-2013). Later they filled the divorce
Phoebe Tonkin's second series appearing for the CW Network. Her first series for the CW was The Secret Circle (2011), also a supernatural teen drama, which immediately followed the The Vampire Diaries (2009) in the schedule line-up.
David Gallagher (Ray Sutton) previously auditioned for the roles of Damon Salvatore and Stefan Salvatore.
The title card at the beginning of each episode was changed after the first season.
Nina Dobrev (Elena) & Paul Wesley (Stefan) both share Eastern European origins. Nina changed her last name from Dobreva to Dobrev while Paul changed his from Wasilewski to Wesley. Paul sought his family's approval before the name change in 2005.
According to series producer/director Marcos Siega, The CW Television Network originally wanted to cast Ashlee Simpson in the role of Elena Gilbert.
Nina Dobrev was born in Bulgaria and speaks Bulgarian. For this reason Katherine, who was German in the books, became Bulgarian in the series.
Ian Somerhalder (Damon) and Daniel Gillies (Elijah) previously worked together in The Sensation of Sight (2006).
Both Ian Somerhalder and Paul Wesley have guest starred on CSI: Miami (2002). Ian in Season 2, Episode 5 "The Best Defense" and Paul in Season 3, Episode 5 "Legal."
Video/DVD includes Special Features: Into Mystic Falls: Bringing Vampire Lore and the High School Experience from Page to Screen; When Vampires Don't Suck (2010): The Popularity of Vampires and the Fans Who Love Them; The Vampire Diaries: A New Breed of Vampires - Casting the Series; The Vampire Diaries: Vampires 101 - The Rules of the Vampire; Creators/Director Pilot Commentary; Unaired Scenes; The Vampire Diaries: A Darker Truth Webisodes; Second Bite: Gag Reel.
In season 2 episode 14 Elijah uses the last name 'Smith'. The author of the book series last name is Smith.
Matt Donovan as we know him is actually named 'Matt Honeycutt', in the books. Vicki Donovan is 'Vicki Bennett', and they're not related in the books.
In the books: Elena Gilbert has very blonde hair and blue eyes. When watching auditions, the directors made an exception for Nina Dobrev seeing as she was amazing at the part. Caroline is portrayed as Elena's enemy. Instead of having a younger brother, (Jeremy), Elena has a 4 year old sister named Margaret, and instead of Aunt Jenna, Elena's aunt is named Judith.
Jack Coleman guest starred as Caroline's gay father Bill Forbes. He is best known for the role of Steven Carrington in Dynasty, which was a controversial role at the time due to Steven's homosexuality.