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'Argylle' Cast Reacts to Taylor Swift Fan Theory Behind Book (Exclusive)

A viral fan theory argues that the book's author, Elly Conway, is really Taylor Swift in disguise.

Speaking with ET's Nischelle Turner in London on Tuesday, stars Samuel L. Jackson, Henry Cavill, Bryce Dallas Howard, Sam Rockwell, Ariana DeBose, and John Cena weighed in on the viral fan theory that the "Karma" singer wrote the book that inspired the movie. Still, Vaughn admits that he found the theories to be "astonishing," telling ET that it is "weird the amount of odd connections" between the book, film, and the world's most famous singer. Argylle, which also stars Dua Lipa, Sofia Boutella, Bryan Cranston, Catherine O'Hara, and Rob Delaney, releases in theaters on Feb. 2.

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