It’s a familiar story: Virtual unknowns get cast in new series. Series turns into mega-hit. Series gets sold into syndication for mucho $$. Stars, unknown no more, ask for a bump to their relatively low salaries.

For the three main stars of “The Big Bang Theory,” it went exactly like clockwork. And in the end, they got their pay bump (not to mention a small piece of the backend).

Insiders confirm that “Big Bang” stars Johnny Galecki, Kaley Cuoco and Jim Parsons — who had been receiving around $60,000 an episode (hey, not bad) will now make around $200,000 an episode (hey, REALLY not bad!) this season, the show’s fourth. After that, the trio will get $50,000 pay bumps each year: $250,000 in season five, $300,000 in season six and $350,000 in season seven. They will each receive .25 point of the series’ backend.

Deadline’s Nellie Andreeva had the news first.

She also noted that Galecki and Cuoco negotiated together, while Parsons held out longer — before finally accepting the terms that Galecki and Cuoco had received. “Big Bang” makes its big move to Thursday nights next week.

As you probably suspected, Warner Bros. TV is not commenting. But I’m pretty sure there were some big hugs in Peter Roth’s office.