Before the sex tape emerged, their father a lawyer, Robert Kardashian, defended OJ Simpson, I believe and possibly that gave them all a leg up into the murky world of being famous for nothing in particular via some rubbishy tv show. Kim's humungous and obviously "enhanced" derriere seems to have played a part in all of that, well I say enhanced, but only if you so desire a butt the size of a planet. Their "mom" manager, went on to marry Bruce Jenner, before "they" became Caitlin, so I guess he's a step mom of sorts now.