The star, 36, looks remarkably different on the reality show to the picture she posted to Instagram back in May.

The two comparison pictures quickly went viral, with internet users accusing the star of using the photo editing tools.

One tweeted the photos side by side, with the caption "khloe... girl..."

Another user commented: "It's weird to me, these famous people who share these images of themselves looking nothing like they look in real life, as if we're not going to be able to figure out they photoshop the last dying breath out of every photo."

A third added: "Her face is completely different. Shes gorgeous either way, no ones disputing that. Photoshop creates unacheivable beauty standards and people want progress."

The reality star stunned fans with a drastic changed to her appearance in May after she darkened her blonde hair.

The Keeping Up with the Kardashians star showed off the new look on her Instagram and it got more than five million likes.

But some fans called her out for “photoshopping” the images and pointed out one major blunder in the shots, which they claimed has proven their theory.

Half of Khloe's necklace was missing from the photos, which suggested the photo has allegedly been photoshopped.

A close-up of the photo showed Khloe wearing a dainty silver necklace with a butterfly pendant, but the chain on one side of the butterfly is missing completely.

The look shocked followers who said the star looked “unrecognisable” after undergoing the makeover.

She again shocked fans in June as she debuted her brown hair on her 36th birthday.