The Duggar family is and its hit TLC show 19 Kids and Counting attract millions of viewers and millions of ad dollars to the network that made them stars.
But they've quietly become stars in their own right - quiet in the figurative, under-the-radar sense, not literally with 19 kids - throughout much of America.
The family gets its share of celebrity gossip coverage, especially lately, but not nearly as much as, for example, the Robertsons on Duck Dynasty.
The Duggars are a deeply conservative, religious people who save their first kiss before marriage, yet they've become a bona fide force of nature.
Even in a culture where a Kim Kardashian sex tape launched the so-called First Family of Reality TV, the polar opposite Duggars have thrived.
19 Kids and Counting has developed a very devoted fan base since it debuted in 2008, starting off strong and only growing stronger in ratings.
They even have a spinoff now. A Duggar Leaves Home, in which Amy Duggar goes to Nashville to pursue her singing dreams, kicked off Tuesday.