“Good Morning America” is about to get a mouthwatering opportunity to embarrass its arch rival, NBC’s “Today” show, live on TV.

Page Six has learned that Ronan Farrow is booked for ABC’s “GMA” to promote his new tome “Catch and Kill” — in which he’s expected to reveal new sexual misconduct accusations against former “Today” host Matt Lauer and argue that NBC intentionally stifled Farrow’s investigation into Harvey Weinstein. We’re told the writer will be on “GMA” Friday, Oct. 11.

When asked if he will be quizzed on NBC, a source said: “I have no idea — I’m sure he’ll talk about anything that’s in his book.”

As Page Six has revealed, Farrow has spoken to the woman whose claims of Lauer’s misconduct led to him being fired in November 2017. The as-yet-unnamed woman will publicly reveal her identity in the book for the first time, while new accusers are expected to tell of their experiences with Lauer.

We’re told that NBC is gearing up to refute any claims that Farrow might make in his book, out Oct. 15, about the network’s supposed interference in the Weinstein investigation, which Farrow was working on while he was a regular NBC contributor.

Execs are believed to have records to back up their reporting of events — and are said to be nonplussed about why he’s making the claims. They’ve called it an “outright lie.”