The series, which premiered on E!
Kris' son Rob Kardashian appeared in a few seasons as did her ex, Caitlyn Jenner.
When the show began they were still married.

They have the most children out of all the siblings (viaPopSugar).
Kourtney Kardashian and Scott Disick co-parent three children together and were the first to become parents.
Their children are Mason, Penelope, and Reign.

Rob and Khloe Kardashian each have one child.
Rob and his former fiance Blac Chyna have a daughter named Dream.
Khloe and Tristan Thompson share a daughter named True.

As of now, Kendall Jenner remains the only sibling that is childless.
According toW Magazine, the contract signed with E!
was for $30 million a season.
Though this may seem like an incredible about of money, Hulu certainly got a good return.
In fact, theseries allegedly crashed Huluwhen it premiered.
I think that anybody would be foolish to say that money doesn’t matter anymore."