J.K. Rowling and Piers Morgan’s weekend Twitter war was the stuff of the ages

FILE - In this April 9, 2015 file photo, Author J.K. Rowling speaks at the Empire State Building during a lighting ceremony and to mark the launch of her non-profit children's organization Lumos in New York. Rowling announced Friday, June 26, 2015, that a new play called "Harry Potter and the Cursed Child" will open at London's Palace Theatre about a year from now in the summer of 2016. Rowling tweeted that the play explores "an untold part of Harry's story" and is not a prequel. (Photo by Evan Agostini/Invision/AP)

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British TV personality Piers Morgan and British author J.K. Rowling are in a Twitter war over American politics.

He called her work “drivel,” and she called him “amoral” after Morgan defended the U.S. government’s travel ban during an appearance on HBO’s “Real Time with Bill Maher” on Friday.

RELATED: Watch Piers Morgan and Jim Jefferies get into an insane argument over Trump’s travel ban 

Morgan faced off with Australian comic Jim Jefferies on the episode during a discussion of the executive order. Morgan said it was “not a Muslim ban,” and Jefferies directed an expletive at him. Rowling tweeted that it was “satisfying” to hear Jefferies say that.

A flurry of tweets between Rowling and Morgan followed.

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