It's no secret that the Kardashian-Jenner sisters bear a resemblance to each other, but now Khloé has posted a new Instagram snap of herself that left everyone wondering if it was actually Kylie Jenner in the picture.

This comes after Khloé left fans baffled back in May when she posted pictures of her new 'bronde' hair that had f ans claiming that she had "changed her face".

In the video below, O.J. Simpson denies fathering Khloé Kardashian:

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While the reality star and mom-of-one went on to clap back at these accusations of having had plastic surgery, posting a series of other snaps, there's no doubt that she bears a striking resemblance to Kylie in her latest picture that's got everyone talking.

Prior to posting the picture, Khloé revealed that she'd gone brunette on her 36th birthday, captioning snaps of her new color: "I’m loving my brown hair. I never thought I would say that lol blonde still owns my heart but this brown is giving me a little something right now."

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Now, while there's no doubt that the 36-year-old is rocking this brunette look, it's unquestionably very different to how we've been used to seeing her recently, so much so that when she posted additional new snaps, people thought that she was Kylie Jenner.

She captioned the picture below: "I look so young in this photo. I love it! Lol maybe it's the hoodie?!"

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And her fans were quick to point out the strikin resemblance Khloé bears to Kylie in the snap.

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And it wasn't long before speculation about the new snap spread all over Instagram and even made its way to Twitter.

One Twitter user wrote: "WAIT THAT WAS KHLOE??? i scrolled through in ig (even double tapped it) thinking it was kylie."

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A second added: "Dead *ss I thought this was Kylie.... it's Khloe.....what is going on????"

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Meanwhile, a third simply wrote: "now Khloe looks like Kylie."

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To put the resemblance into context, this is one of Kylie's latest snaps. The two could be twins!

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Everyone thought Khloé Kardashian was Kylie Jenner in her new Instagram snap