The I Am Cait star and former Olympic champion took to Instagram to show off her lighter and longer locks.
"I'm trying something new with my hair," Jenner, 67, wrote. "What do you think of the colour and style?
Jenner was most recently sporting shorter hair without the new blonde highlights.
Her hair transformation comes at the same time as pregnant daughter Kylie Jenner.
The star showed off her newly blonde hair on snapchat with her half-sister Khloé Kardashian, who is also expecting her first child with boyfriend Tristan Thompson.
This article previously appeared on WHO.