Jack Antonov had no choice but to shake it off when a fan asked him to sign a poster referencing William bowy AKA Taylor Swift's ex-boyfriend Joe alwin the funny encounter went down during a signing event at rough trade Berlin on Saturday August 31st a fan approached Antonov 40 with a poster in the style of the 22 shirt Swift 34 wears during her era's tour and read its text aloud to him who's William bowy anyway in in response Antonov Shrugged and laughed for an x video The Fan later shared a photo of the autograph Antonov gave her which included the word folklore the Grammy winner was in Berlin for a bleachers show on Friday August 30th according to a Reddit post one fan in the audience held up a similar William Bowery sign during the concert and Antonov again laughed in response as Swift fans know William bowy was the Alias used by alwin 33 when he collaborated with his ex-girlfriend on several tracks from her albums folklore Evermore and midnights while fans speculated that bowy was really elwin Swift didn't confirm his identity until November 2020 when she spoke about it in the Disney plus documentary folklore The Long Pond Studio sessions I came in and I was like hey this could be really weird and we could hate this but because we're in quarantine and there's nothing else going on could could we just try to see what it's like if we write this song Together Swift said adding that alwin wrote the entire piano part for Exile on folklore he was just singing it the way that the whole first verse is I was entranced and asked if we could keep writing that one