The former brunette also debuted her blonde hair on the catwalk at the Spring 2020 Burberry show.
Kendall looked stunning - which was parted down the middle to reveal her dark roots.
WATCH: Kendall Jenner dyes her hair blonde
However, she's not the first supermodel to make the same hair transformation recently.
In fact, her best friend Bella Hadid - who also walked in the Burberry show - dyed her previously dark hair a honey blonde colour several months ago.
Yesterday, Kendall was also spotted with her new blonde hair at the LOVE & YouTube LFW party hosted by Katie Grand & celebrity hairstylist Derek Blasberg at Decimo at The Standard, London.
Whether or not the look will last forever is up for debate, as the 23-year-old previously wore a blonde wig for the Balmain runway show at Paris Fashion Week in 2016 and another for Halloween in October last year.
Perhaps Kendall will take a leaf out of one her Kardashian-Jenner sisters' books.
Kim Kardashian dyed her hair platinum blonde for Paris Fashion Week in 2014, and Kylie Jenner's hair changes from dark brown to blonde almost yearly.
Kendall attended the LOVE & YouTube LFW party hosted by Katie Grand & celebrity hairstylist Derek Blasberg at Decimo at The Standard, London.
According toBustle, Kendall - who is currently the highest-paid supermodel - didn't walk any shows during New York Fashion Week this year and instead walked the runway show in London for the iconic British brand.
In other news, Kendall was slammed online earlier this month for wearing cornrows while on vacation in Jamaica with Hailey Baldwin and Justine Skye.
Girlfriendreported that the brunette face backlash from Twitter users who called her out for cultural appropriation.