“You built Hogwarts as a home for her to return to.”
Letters Live is an event, currently taking place in London, which invites celebrities to read aloud "remarkable letters written over the centuries and from around the world".
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On Sunday, actress Carey Mulligan took to the stage to read aloud a letter written to J.K. Rowling by the mother of a young girl who was suffering with cancer.
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"Your words built a castle for her to move into when the prognosis got worse," Chrissy Hart wrote. "Mrs Rowling, cancer threatened to take everything from my daughter, and your books turned out to be the fortress we so desperately needed to hide in."
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The Mother Of A Young Cancer Patient Wrote A Moving Letter To J.K. Rowling