KELLY THREATENS TODAY'S TOMORROW FOR GUTHRIE & HAGER

Worry restless Clarkson could displace them

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DAYTIME divas Savannah Guthrie and Jenna Bush Hager are quaking in their boots amid rumors that NBC is courting chatfest success Kelly Clarkson to jump-start Today, sources share.

Guthrie, 53, and Hager, 43, have been top dogs at the morning show since fan favorite Hoda Kotb, 60, quit in January to spend more time with her young daughters. But ratings for Today have slipped 4 percent in comparison to the same time last year.

Sources snitch that execs are disappointed that some viewers stopped tuning in after Hoda hit the road.

“Savannah and Jenna were given keys to the kingdom,” an insider says. “But they aren't moving the needle, and you can be sure the network isn't going to sit idly by.”