14 little-known facts about Blair Waldorf even die-hard 'Gossip Girl' fans may have missed

Blair's full birth name, which is said several times throughout the series, is Blair Cornelia Waldorf.

She doesn't alter her name even after her parents separate and her mother remarries.

Blair's birthday is shown to be in the fall on episodes like "Seventeen Candles" and "War of the Roses."

Both episodes aired in November, which would likely mean that Blair is a Scorpio, a sign that fits her passionate but manipulative nature. For further evidence, in the "Gossip Girl" novels, her birthday is supposedly said to be November 15. 

Blair's father and his partner live in a chateau in France with a room designed especially for Blair. There, she has a cat named Cat in tribute to Audrey Hepburn's pet in "Breakfast at Tiffany's."

Blair has a necklace that she wears on the first few seasons. A lowercase silver B and W are looped through a silver chain.

Blair stops wearing the necklace when she begins college.

Blair was portrayed by Leighton Meester, who also had a brief music career.

Meester was featured on Cobra Starship's "Good Girls Go Bad." The song plays on the third season when Blair walks into Georgina Sparks' rooftop party after Dan Humphrey upstages her.

"Gossip Girl" parents are usually involved with their own chaotic drama, as Nate Archibald's had financial and legal issues, Serena van der Woodsen's mother had multiple relationships and health scares, and Chuck Bass' family occasionally tried committing murder. 

Unlike her peers, Blair is pretty close with both of her parents. Her mother, Eleanor Waldorf, can sometimes be too busy with work to care for her, but her father, Harold Waldorf, adores her and always makes time for her when he's in the country.

After all the chaos Georgina caused in the first two seasons, Dan's decision to date her on season three was a surprise to their friends and many viewers.

Blair was the first to find out about their relationship since she was Georgina's roommate at the time.

Though Blair can be dramatic, she's not a fan of a late entrance. She's consistently prompt and can be furious when other people arrive late to important events.

Blair got into fights with several parties when Nate ran past his time to find her at the season-one masquerade and when Carter Baizen was late at Rufus Humphrey and Lily van der Woodsen's wedding.

Blair is constantly plotting to get what she wants, a skill she's perfected by studying famous military figures.

When planning the NYU freshman toast, Blair mentions she's inspired by Mao, Sun Tzu, and Napoleon. On a season-six scheme, Blair also says she's studied Byzantine warfare.

Blair has some pretty memorable arguments with her friends but when she's at her most stressed, she appears unnervingly serene.

Chuck and Nate comment on this during season three's cotillion episode, when Blair and Serena are fighting. She had previously appeared calm when she was distressed about Serena leaving for boarding school.

The series' core friend group is made up of Blair, Serena, Chuck, and Nate and occasionally includes Dan and Vanessa.

Blair has dated all the men in the friend group: Chuck, Nate, and Dan.

Though Eleanor and Cyrus Rose get married on the show, they also have a daughter together in the "Gossip Girl" books. Blair is allowed to pick her younger sister's name and chooses to call her Yale after her dream school.

The books also depict Blair with a younger brother from Eleanor and Harold's marriage and two adopted brothers from Harold.

Blair repeatedly mentions she's fluent in French, a skill she may have learned after her father moved to the country.

When Blair and Serena spend the summer in Paris at the start of season four, Blair is shown speaking French several times.

Each "Gossip Girl" episode title references well-known movies. Various characters have episodes named after them, such as Serena and Dan with "Desperately Seeking Serena" and "Memoirs of an Invisible Dan," respectively.

Blair has the most episodes to her name, with four titles including "Bad News Blair," "Blair Waldorf Must Pie!," "The Blair Bitch Project," and "The Unblairable Lightness of Being."