The 37-year-old reality star isn't the only one to sport the casual look.
Kourtney Kardashian is taking the "just rolled out of bed" look to a whole new level.
The 37-year-old reality star rocked a silk pajama ensemble -- complete with a full face of makeup and black heels -- on Wednesday.
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"I decided it's pajama day," Kourtney captioned a Snapchat of her casual, braless look.
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Though Kourtney's pajama getup is definitely unique, she's not the first celeb to step out sporting such attire.
Selena Gomez has been spotted several times in cozy sleepwear, as has Rihanna.
Just last month, Kourtney slayed in another sexy pair of PJs, while attending a pajama party with Jessica Alba, Chrissy Teigen and John Legend.
See more in the video below.