Kourtney Kardashian and Lindsay Lohan just took the ultimate selfie!

While visiting London, the KUWTK star took time out of her busy schedule to hang out with the Mean Girls alum who's currently living in the European city.

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"London calling," the mother-of-three captioned the grainy image, which Lindsay also shared, writing, "My #twin @kourtneykardash has arrived!"

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London calling.

A post shared by Kourtney Kardashian (@kourtneykardash) on

Along with taking photos, it looks like the 37-year-old brunette beauty traded outfits with the controversial actress, rocking the same Union Jack-inspired dress in a separate post.

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❤️🇬🇧💙

A post shared by Kourtney Kardashian (@kourtneykardash) on

While it might seem strange that Kourtney and Lindsay are hanging out together, the 29-year-old actress has been a longtime pal of the Kardashian family, and was even invited to Kim Kardashian's wedding to Kris Humphries in 2011.

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For more unlikely celebrity friendships, check out the gallery below!