Taylor Swift is stepping into the world of Toy Story for the first time, revealing she has written an original song for Disney and Pixar's upcoming Toy Story 5.

I Knew It, I Knew You was written and produced with long‑time collaborator Jack Antonoff and will be released globally on June 5 across all major streaming and download platforms. The single will also appear on the official Toy Story 5 soundtrack when it arrives on June 19.

Taylor has also launched three exclusive CD editions through her official website, each featuring a different version of the song - the film version, an acoustic take, and a piano rendition - all with alternate vocals and production.

Taylor's new track draws directly from Jessie's storyline in the upcoming film, tapping into the cowgirl's emotional highs and lows. The project sees the pop superstar leaning back into the country textures that shaped her early career, while still weaving in the pop sensibilities and narrative detail she's known for. Jessie, who first galloped into the franchise in Toy Story 2, struck an immediate chord with Taylor when she watched early scenes from the new instalment, prompting her to dive straight into writing.

Announcing the news on Instagram, she wrote: "It's a Toy Story. You knew it! My new original song 'I Knew It, I Knew You' for Disney and @pixar's @toystory 5 will be yours on June 5th… I've always dreamed of getting to write for these characters who I've adored since I was a 5‑year‑old kid watching the first Toy Story movie… I wrote this song as soon as I got home from the screening. Sometimes you just know, right?"

Director and screenwriter Andrew Stanton said Taylor's instinctive understanding of Jessie's emotional state made the collaboration feel "meant to be."

He said Taylor's song felt so naturally tied to the film that it was "like a long‑lost family member" returning to the franchise.

The confirmation of Taylor's song follows a wave of mysterious "TS" billboards - teasing both Toy Story and Taylor Swift's initials - appeared across major cities over the weekend, from Los Angeles and Chicago to Toronto, Mexico City and London. The stunt sparked intense fan speculation, which only grew after a themed countdown quietly launched on Taylor's official website and additional signage lit up in New York and LA ahead of the announcement.