Kendall's hair now cascades in layers past her shoulders, and is textured with beachy waves.
It's a stark contrast from her sleek, straight styles of the past.
And while it might not be the lightest Kendall has ever gone, it is significantly lighter than her trademark look.
She captioned her selfie video of the new 'do by simply writing, "I'm sleepy."
Kendall's new look comes after the Keeping Up With The Kardashians star was seen in a pink wig as she imitated her sister Kylie in a recent episode.
Kendall trolled Kylie, mocking her younger sister's over-lined lips in a hilarious impersonation.
"I love over-lining my lips, this is how it all started," the 24-year-old said, mimicking her sister.
"Literally, I just over-lined my lips and everyone was wondering what I was using."
"Oh my god, it feels amazing on my skin," joked the model, as she smeared a bottle of Kylie's lip gloss over her teeth and around her mouth.