We kid you not, Kourtney K and Justin Bieber are dating for REAL

It's not Kendall Jenner, or even Hailey Baldwin. 

Nope, Justin Bieber's latest squeeze is in fact none other than Kourtney Kardashian, the mum of three who's also 15 years his senior.

According to Us Weekly, "multiple" sources have confirmed that the pair are dating, and have been seeing each other for "quite some time."

Justin "bragged to friends recently that he has been hooking up with Kourtney Kardashian," one insider told the magazine, with another adding that K & J were "definitely" an item.

First Gigi and Zayn, now Justin and Kourtney. Is this real life?! 

Any eagle-eyed followers of Justin's Instagram would have noticed a very telling photo posted just a few hours ago, which seems to be a blatant dig at Kourtney's ex, Scott Disisk.

Sharing a photo of himself leaning over a mystery woman as she sits atop a black Audi, Justin wrote, "Lord knows" – which many are taking as a reference to Scott's Instagram handle, @LetTheLordBeWithYou.

And of course, Scott's also known to some of his pals – Kourt's little sister Khloé in particular – as Lord Disick.

As well as being spotted together at an American Music Awards after party late last month, Justin and Kourtney also had dinner together in October, before heading to Universal Studios for a Halloween horror night.

Yup, that sounds like a first date to us.

If this is for real, we are shocked, but we also so kudos to Kourtney for showing Scott what's what.