Since "Young Sheldon" is one of the most-watched series on TV, it's no surprise that CBS just greenlit two more seasons of the "Big Bang Theory" spinoff.

Iain Armitage stars as  10-year old Sheldon Cooper  as he struggles to fit in with his family and classmates in East Texas.

The only show that's more watched on good old broadcast TV? Mother ship "Big Bang Theory." The prequel series currently averages 14.6 million viewers per week in the Nielsen Live+7 numbers, according to Variety.

The series finale for Season 2 airs March 7.

The news also comes as “Big Bang" prepares to air its series finale this spring, wrapping up a 12-season run on the network.

"The Coopers are portrayed by an amazing cast, and we are looking forward to having the gifted writing staff mine even more of Sheldon’s hilarious backstory and the warm family dynamic that has made this comedy a favorite with audiences for the past two seasons," said Thom Sherman, senior executive vice president of programming for CBS Entertainment in a statement.

Also recently renewed on CBS: "Mom," "God Friended Me," "FBI," and "The Neighborhood." And the 15th and final season of "Criminal Minds."

[Via Variety]