Taylor Swift has reunited with producer Jack Antonoff for a new original song, "I Knew It, I Knew You", which is reportedly for Toy Story 5. It is unclear if Swift is married, but there are reports of a rehearsal dinner, where Antonoff was spotted with his ex, Lena Dunham. The song's release and details about Swift's potential wedding and new music projects are being reported by various outlets, with some indicating she may be working with other producers on an album.