Ratings-challenged CNN canceled its scandal-scarred morning news show in a massive shakeup, the cable network announced Monday.

“CNN This Morning,” the signature program created by failed former CNN CEO Todd Light, will no longer air from 6 a.m. to 9 a.m. and co-anchors Poppy Harlow and Phil Mattingly will be reassigned, new CNN boss Mark Thompson said in a memo to staff.

Thompson also said the network will abandon producing the morning show in New York City — and that the 50-person staff that worked on “CNN This Morning” from its glittering Hudson Yards studio has been asked to reapply for jobs, according to the memo, first reported by The Guardian.

The “CNN This Morning” brand will continue under a new format with Kasie Hunt, the former MSNBC reporter, anchoring the show from Washington, DC., from 5 a.m. to 7 a.m., according to CNN.

“CNN News Central,” the news show that is broadcast from 9 a.m. to 12 p.m., will now begin two hours earlier, starting at 7 a.m. and running until 10 a.m.

The show is helmed by co-anchors John Berman, Kate Bolduan and Sara Sidner from CNN headquarters in Atlanta.

Jim Acosta, the former White House correspondent known for his testy exchanges with then-President Donald Trump and his aides, will anchor a daily one-hour show beginning at 10 a.m.

Pamela Brown has been slotted to host a one-hour show beginning at 11 a.m. Since Brown is currently on maternity leave, veteran anchor Wolf Blitzer will assume hosting duties on an interim basis, according to the network.

Thompson said that the “change in strategic direction” was “not a reflection on the talent, expertise and dedication of the New York based editorial production and operations teams who’ve worked on our morning output.”

“They’re among the best in the business,” Thompson wrote.

“I’m very aware that today’s announcement means a great deal of uncertainty for many valued colleagues,” Thompson said.

He added that “change and uncertainty are inevitable in an industry undergoing a revolution” and that the network “must never underestimate the human consequences that come in their wake.”

The Post has sought comment from CNN.

The shakeup comes amid the network’s efforts to boost its sagging ratings which has CNN far behind rivals Fox and MSNBC.

“CNN This Morning’ averaged 322,000 total viewers last month, less than a third of those who tune into MSNBC’s “Morning Joe,” according to Nielsen ratings. “Fox and Friends” was the top-rated cable news show in the morning last month, with 1.068 million average viewers.

CNN also trailed in the coveted 25-to-54 age demographic, garnering just 64,000 average viewers last month. By contrast, Fox posted 144,000 and MSNBC had 104,000 in that demo, according to Nielsen.

So far this year, “CNN This Morning” has seen its worst year in the 25-54 age demographic, according to Nielsen.

Fox News is owned by Fox Corp — sister company to The Post’s parent News Corp.

“CNN This Morning” was the brainchild of Licht, who was fired last summer after a disastrous 14-month stint as network boss.

Licht originally cast Harlow alongside Kaitlan Collins and Don Lemon as co-anchors.

But a lack of chemistry and a tense relationship between Lemon and Collins, as well as Lemon’s ill-advised remark about GOP presidential candidate Nikki Haley being “not in her prime” at age 51 led to Lemon’s eventual firing.