Scott Disick turned 33 yesterday, and while he's planning to throw a lavish birthday party tomorrow, the Kardashians celebrated it on Instagram last night.

But the one that stood out most was Scott's former partner, Kourtney's post. 

The reality star shared a throwback picture of their much younger days and it saw Kourtney sitting on Scott – wearing a bikini – while he lay back on a couch.

She simply captioned the snap, "Happy birthday baby daddy."

 

Happy birthday baby daddy!

A photo posted by Kourtney Kardashian (@kourtneykardash) on

The photo shows their happier times together, so it could mean that the pair are finally getting back on track.

Khloe also shared a cute photo of her and Scott linking arms, and wrote a more heartfelt caption:

Happy birthday, Scott!