Author J. K. Rowling joined in on the thrashing that former CNN host and U.K. tabloid editor Piers Morgan received from Australian comedian Jim Jefferies on Friday’s Real Time with Bill Maher regarding Pres. Donald Trump’s Muslim ban.

“Yes, watching Piers Morgan being told to f*ck off on live TV is *exactly* as satisfying as I’d always imagined,” the Harry Potter author tweeted Saturday.

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Yes, watching Piers Morgan being told to fuck off on live TV is *exactly* as satisfying as I’d always imagined. https://t.co/4FII8sYmIt — J.K. Rowling (@jk_rowling) February 11, 2017

“This appeared to get under Morgan’s notoriously thin skin,” said The Daily Beast’s Marlow Stern, because Morgan tweeted back, “This is why I’ve never read a single word of Harry Potter.”

This is why I’ve never read a single word of Harry Potter. https://t.co/XUJBMs4KKm — Piers Morgan (@piersmorgan) February 11, 2017

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Rowling — known for her deft handling of Twitter trolls — clapped back, writing, “Because you had a premonition that one day the author would roar with laughter at seeing you called out for your bullsh*t on live TV?”

Because you had a premonition that one day the author would roar with laughter at seeing you called out for your bullshit on live TV? https://t.co/8rkKSqJTnG — J.K. Rowling (@jk_rowling) February 11, 2017

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She kept at him, asking, “Would you like a couple of hours to mock up some pictures of refugees carrying explosives to substantiate your position?” and then saying, “The fact-free, amoral, bigotry-apologism of celebrity toady Piers Morgan is, of course, why it’s so delicious to see him told to fuck off.”

.@piersmorgan Would you like a couple of hours to mock up some pictures of refugees carrying explosives to substantiate your position? https://t.co/sFj0kqIajd — J.K. Rowling (@jk_rowling) February 11, 2017

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The fact-free, amoral, bigotry-apologism of celebrity toady Piers Morgan is, of course, why it’s so delicious to see him told to fuck off. https://t.co/4XNF4G0nlD — J.K. Rowling (@jk_rowling) February 11, 2017

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The billion-selling author is currently working on two new novels, one under her own name and a new detective thriller under her pseudonym Robert Galbraith.

UPDATE: In another Saturday tweet, Rowling said Morgan is probably still upset that she beat him out for 2005’s Book of the Year at the British Book Awards.