Taylor Swift is one of the biggest icons of our lifetime, but once upon a time she was just a regular kid living with her parents in Tennessee, dreaming of a successful music career. Abigail Anderson has been her best friend since that time, when they met at the beginning of high school, and the two have only gotten closer over the years. She is never far from Taylor's side and the lengths they've gone to for their friendship are seriously impressive. How many stars are still that close with their childhood besties?

Taylor Swift speaks admiringly of Abigail in interviews all the time and has even written songs for and about her. When was the last time your best friend wrote a song about you? Or put you in their music video? Or got your favorite band Dashboard Confessional to come sing to you on your birthday? Get ready for some serious BFF goals. Here's everything you need to know about Taylor Swift's best friend, Abigail Anderson,.

9 She Inspired Taylor's Song 'Fifteen'

Taylor Swift's song "Fifteen" features Abigail as a character and chronicles her first relationship with a boy who would later break her heart. Abigail and Taylor met in ninth grade at Henderson High School in Tennessee while sitting next to each other in English class.

8 She's Been Married For 4 Years

Abigail Anderson got married to Matt Lucier, a photographer, on Martha's Vineyard in 2017. Of course, Taylor Swift was up there with her bestie, standing right beside her as one of her bridesmaids. Taylor's speech at the wedding made waves when it was leaked on the internet. Now, however, many are speculating that Abigail might be divorced, because she's deleted all pictures of Matt from her Instagram, and Taylor has deleted pics of herself as a bridesmaid as well.

Related: Camila Cabello Opens Up On Her Friendship With Taylor Swift

7 She Has Been In Taylor's Music Videos

Not only was Abigail Anderson featured in "Fifteen," she was also in five other Taylor Swift music videos including, "I’m Only Me When I’m With You," "Picture to Burn," "22," "Teardrops on My Guitar," and "New Romantics." Given that "Fifteen" and "Teardrops On My Guitar" were some of her earliest hits and "New Romantics" one of her later ones, it's impressive just how long these two have been close and how invested Taylor has been in having Abigail be a part of her success.

6 She Was A College Swimmer

Abigail Anderson took quite a different path than Taylor Swift after high school. While Taylor was already on her rapid ascent to fame, Abigail headed to Kansas University, where she earned a full ride scholarship as a swimmer for four years. The pair remained close throughout their college years even as Taylor began to head out on the road and have a successful music career.

Related: 10 Songs Taylor Swift Has Written About Her Boyfriend Joe Alwyn

5 She Was Taylor's Date To The 2015 Grammys

Taylor Swift loves her best friend Abigail so much she even brought her as her date to the 2015 Grammys. This may have been a strategic move as much as it was a sign of their close friendship; Taylor Swift had been the subject of so much dating gossip that she was beginning to be more discreet about her relationships at that time. Since she began dating her now-boyfriend Joe Alwyn, she's been extra tightlipped about her love life, and bringing Abigail as her date may have been an early move in that direction.

4 She Works With Veterans

After earning her Bachelor's degree, Abigail began her work with World War II veterans, working to make sure they got benefits and compensation they were owed and that they were taken care of after their years of service. Taylor Swift has spoken about how much she admires Abigail's work: “She's so passionate about it and it couldn't be more different from my career ... but the fact that she is so passionate about what she does allows her to be able to relate to me on that level, that I'm so dedicated to what I do,” Taylor said in 2014.

3 She's Obsessed With Her Dog

The only thing that appears on Abigail Anderson's Instagram grid more than pictures of Taylor Swift is pictures of her dog. She adopted her dog, a Golden Retreiver named Lilly Rose, several years ago and frequently posts cute pictures of the pup. She appears to love cats too, though, because she is also often seen posting pictures of Taylor's cats, famously named Meredith Gray, Olivia Benson, and Benjamin Button.

Related: 8 Times Taylor Swift Was Featured On Songs By Other Artists

2 'Happiness' May Be About Abigail's Marriage

Taylor Swift has made many comments about how her folklore and evermore albums were different from previous ones because she was more adventurous in storytelling, often adopting a different persona or character from whose point of view she would tell the story. Fans have speculated that "Happiness" is one of those songs, and that it is actually about Abigail's divorce, from Abigail's perspective. The lyric "I can't make it go away by making you a villain / I guess it's the price I pay for seven years in heaven" caused fans to speculate because Abigail's relationship with Matt reportedly lasted seven years.

1 She Once Brought Taylor To Her College

In 2009, during her freshman year at Kansas University, Abigail brought Taylor to her 400-student Journalism 101 class. It was reportedly her favorite class and she wanted to share it with her bestie, who didn't get a traditional college experience. Taylor had just finished her Fearless tour and was already fairly famous, so naturally the university was alight with buzzing students hoping to catch a glimpse of the country-pop sensation.

Next: Here’s Why Taylor Swift Doesn’t Speak To Lorde Anymore