It was Rob Kardashian's 30th birthday celebration but the birthday boy was nowhere in site!

Apparently after his last outing for family movie night, when photographers (including ours) surrounded the new father, it was a little much for him. Rob's just doesn't love being in the spotlight and now he's gone back into hiding after that recent incident.

But it didn't stop Kris Jenner from forcing a birthday party on her son, in a public venue, surrounded by the Kardashian ladies in full hair and makeup. Oddly, estranged baby mama Blac Chyna even turned out ... without her engagement ring!

So are these two really "off" or are they kinda "on"? It's so hard to tell ...

Kris carried in a mini-St. Patrick's Day leprechaun hat, being that the big day falls on St. Patty's Day. She even wore a green coat. Kourtney shocked in ripped jean shorts, a side-boob/bra revealing tank and heels, while Khloe looked like a million bucks in a blue-and-black checkerboard jacket. And her bodyguard carried a massive Gucci bag -- probably new slides for Rob :)