'Pajama jammy jam!' Kourtney Kardashian cuddles up to Kim's bestie Chrissy Teigen at Cash Warren's star-studded PJ party

She's Kim Kardashians bestie.

But with her sister out of town it was Kourntey Kardashian who cosied up to Chrissy Teigen, as the pair attended a pajama party together. 

Kourtney shared a photo of the group's LA night out - thrown by Jessica Alba in honour of her husband Cash Warren's 38th birthday.

The cool kids club: Kourntey Kardashian, 37,  enjoyed a pajama party with best friends John Legend, 38, and Chrissy Teigen, 31 in LA

Mum-of-two Kourtney was comfortable in a lace nightgown, layered under a silk robe.

Model Chrissy was completely relaxed in a Kentucky Fried Chicken hoodie, while her crooner hubby dressed up as the southern favorite himself. 

John Legend and Kourntey gave their best smiles, while Chrissy appeared slightly tired from their evening hangout. 

'Space buns!': Chrissy's hair was styled in two playful buns

Call it a night in Chrissy's novelty onesie

Awards season has just started, and we're getting used to seeing A-listers dressed to the nines on the red carpet every night.

So just to mix things up a bit, Jessica Alba threw Cash Warren a star-studded pyjama party to celebrate his birthday. And that can only be good news for us. Let's face it, we're more likely to wear a onesie than a black tie gown at the moment!

Chrissy Teigen and John Legend really embraced the theme, wearing onesies with the KFC Colonel and some fried chicken printed on them. #RelationshipGoals

Whether it's for a PJ party or for a cosy night in with a box set, you can get Chrissy's novelty all-in-one from Scruffy Swanks by clicking the link (right). We warn you though, it will make you hungry!

Or lounge around in one of the options we've picked out for you in the edit below.

* PRICES MAY NOT BE AS ADVERTISED

Going glam! The stunner's make-up featured a bronzed, smokey eye, bright cheeks and a mauve nude lip

It's all about her! John let his wife have the spotlight as he trailed behind her

Feeling playful: The handsome singer was in a light-hearted mood

While the party was a relaxed theme, it was still an excuse to glam up.

On Snapchat, the Chrissy, 31, shared a video of her team getting her ready, as a hairstylist touched up her do, while John looked on.

She later took to Twitter for additional commentary. 

'The best part of a pajama jam party is my hair and makeup people trying to make a look out of a kfc onesie,' she joked.  

Going all out: While pajama party looked to be a casual get-together among friends, even that required a glam session

Difficult task: She also took to Twitter for additional commentary

Living it up! Chrissy and John, who recently celebrated daughter Luna's ninth birthday, also shared additional snaps during their night-in event

Over-the-moon: The cookbook author and her hubby posed together for multiple photos, with Chrissy acting tough in one and in another, appearing to look lovingly at John

Chrissy and John, who recently celebrated daughter Luna's nine-month birthday, also shared additional snaps during their night-in event. 

The cookbook author and her hubby posed together for multiple photos, with Chrissy acting tough in one and in another, appearing to look lovingly at John.  

While it was obvious what the model was dressed as, she made sure to clarify her husband's onsie choice. 

'Chicken,' she wrote in a snap shared to Twitter.

'Chicken': While it was obvious what the model was dressed as, she made sure to clarify her husband's onsie choice

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