Argylle's Taylor Swift theory gets a definitive answer from director Matthew Vaughn. The new star-studded film, based on the novel of the same name, has been a topic of Swift's fandom in recent weeks, as her fans claim the singer wrote the book under a pseudonym. The theory began when some discovered there is no internet history of an Elly Conway, the author who wrote Argylle. Then, people recalled Swift's history of wearing and sellling argyle sweaters. A few other similarities, such as Swift owning two Scottish Fold cats, the same as Argylle's protagonist, fueled their discussions.

https://screenrant.com/argylle-book-taylor-swift-author-theory-vaughn-response/