But yesterday the pair decided to try out a new look, stepping out in Calabasas, California, with long blonde locks.
Kendall, 16, and her 14-year-old sister debuted their new looks as they took Kendall's Range Rover to be washed.
Blondes have more fun! Kendall (right) and Kylie Jenner debuted their lightened locks in Calabasas, California, yesterday
She shared a picture of her normal brown hair, captioning it: 'Don't worry! Still a brunette! #fooledyou #sillyme.'
Cheeky! Kendall tweeted a picture of her seemingly blonde hair... before revealing it was a wig
Copycat Kylie: Kendall's 14-year-old sister Kylie also took the opportunity to try out a different look with a wig
Kendall's sister Kim also shared the picture of her blonde sibling on her page, writing: 'It’s just a wig, but doesn’t Kendall look great as a blonde!?!
'It’s fun to experiment with different looks some times… even if it’s just for the afternoon! lol.'
Kim had earlier tweeted Kendall saying: 'Don't blondes have more fun @KendallJenner?!? LOL.'
As the girls showed off their new looks yesterday, Kylie opted for a cute and casual look in a pair of skinny jeans, UGG boots and a blue sweater.
Keeping her head down: Kendall was stuck to her mobile phone as she got back into her car
Tricked you! Kendall later posted another shot to show that she hasn't actually dyed her brown hair
Both sisters looked in good spirits on their day out, despite a difficult few weeks after their Chihuahua Dolce went missing.
Kendall and Kylie used their fame to appeal for help locating the pooch, and Kendall told E! News earlier this week: We still can't find him. We've had him for like 10 years.
'He was staying with our friends for a little while. They've been friends for a long time ago and they really loved him...and then he got out.'
Model chic: The girls as they usually look with their dark brown hair