The two reunited backstage at the singer's concert in Nashville in August 2018.
The two depart the Bowery Ballroom in Soho in 2017.
Swift posted this throwback selfie on Kloss' 24th birthday in 2016.
The two party inside the elite star-studded event.
The two are spotted at the Four Seasons Hotel in 2016.
The two join Swift's then-boyfriend Calvin Harris and pals Joe Jonas and Gigi Hadid on a boat ride to The Killers concert in London in 2015.
The two pose with Lily Donaldson, Ellie Goulding and Cara Delevingne at the World's First Fabulous Fund Fair 2015, which Kloss co-hosted in support of The Naked Heart Foundation at The Roundhouse in London.
Swift brings Kloss, Martha Hunt, Kendall Jenner, Gigi Hadid and Cara Delevingne onstage during a 1989 world tour concert in London in 2015.
The two grace the cover of Vogue's March 2015 issue.
The two drink beer at a Chicago Bulls vs. New York Knicks game at Madison Square Garden in 2014.
Swift joins her pal and other Victoria's Secret models onstage at the 2014 Victoria's Secret Fashion Show.
The two embrace at Harry Josh's annual HairBall Party in 2014.
The two leave a NYC restaurant in 2014.
The two leave ABC Kitchen in NYC in 2014.
The two head to the Tracy Anderson studio in New York in 2014.
The besties head to dinner in NYC.
The two hit the gym together in New York City in 2014.
The two take a walk on a beach in 2014.
The two appear together at the 2014 American Music Awards.
The two appear on the runway at the 2013 Victoria's Secret Fashion Show.