Jenner, 20, who is currently expecting her first child with rapper boyfriend Travis Scott shared a photo of her all white look on Instagram.
"Halloween W My Lil Devil ♥️," the reality star wrote.
She also shared a video which gave a close-up shot of her beauty look which includes white eyelashes, pink eyeshadow and a nude lip (no doubt a Kylie Cosmetics lip kit colour!)
After weeks of only sharing old photos to her social media accounts, the 20-year-old also gave fans a sneak peek of her bump in a sweet selfie with mum, Kris Jenner earlier this week.
Jenner wasn't the only member of her family to dress up for Halloween this year.
Khloé Kardashian, who is also pregnant with her first child, went as Game of Thrones' Mother of Dragons Daenerys Targaryen, while Kim and Kourtney Kardashian dressed as music icons Michael Jackson and Madonna.
This article originally appeared on WHO