Taylor Swift for the first time.The actor and musician, who is dating the pop star, contributed to her 2020 albums ‘Folklore’ and ‘Evermore’ under the pseudonym William Bowery.Swift revealed the identity of her mystery co-writer in November 2020, though Alwyn hadn’t spoken publicly about the arrangement until this month when he opened up to Vulture about it in a new interview.Alwyn gained co-writing credits for the ‘Folklore’ songs ‘Betty’ and ‘Exile’ as well as ‘Evermore’ cuts ‘Champagne Problems’, ‘Coney Island’ and the record’s title track.The actor told Vulture that he was “messing around” on the piano and was singing what would become the first verse to ‘Exile’ when Swift asked him to help her finish the song.“It was completely off the cuff, an accident. She said, ‘Can we try and sit down and get to the end together?’ And so we did.