Step aside, Kylie Jenner! It looks like Kendall Jenner is the new plump pout princess. Fans are doing a double take after seeing the model's lips in a photo posted to her younger sister's page on July 17, and some are wondering if Kendall possibly turned to lip injections. The photo actually appears to be a throwback, because Kylie still seemingly has fillers, but fans are eager to know about Kendall. Check out the video above to see Kendall's lip evolution!

"Kendall looks so different? Her lips," one fan commented, and this isn't the first time a selfie sparked filler speculation. Kendall shared a fun photo of herself on a boat on July 6, and people pointed out her changed appearance. "Happy camper," Kendall captioned the snap. Several of her followers took notice of her plumper-looking pout and questioned her via social media. "Is it the makeup or is it Botox? I don't know, but you didn't need anything," one wrote.

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love u sister @kendalljenner

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Kylie recently had her filler dissolved and debuted a more natural look, which has already started a new trend. Meanwhile, fans have been questioning for several months now whether or not the 22-year-old has gotten lip fillers like her younger sister. While Kylie has admitted to it multiple times, Kendall has denied the rumors. She insists that her plump pout is all thanks to makeup — she simply overlines her lips with lipstick.

The Keeping Up With the Kardashians star has also been making headlines for her new relationship with NBA player Ben Simmons. Although they have yet to confirm the rumors, the two were caught packing on some major PDA recently. The KarJenners celebrated the Fourth of July with a fun-filled barbeque, and Khloé Kardashian took to her Instagram story to share a video from the party. And eagle-eyed fans were able to spot Kenny and her new beau cuddling in the background of one of the vids. It looks like it's getting serious!