Billboard takes you inside Tuesday night's Hollywood premiere, where Swift's "I Knew It, I Knew You" live debut was just part of the story.

Taylor Swift attends the Toy Story 5 Los Angeles World Premiere at Dolby Theatre in Los Angeles, California on June 09, 2026.

Kevin Mazur/Getty Images for for TAS Rights Management

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Taylor Swift is officially in her Disney Era as of this week, starting with Friday’s release of “I Knew It, I Knew You” for Toy Story 5 and followed by her surprise debut performance of the song at Tuesday night’s (June 9) world premiere of the movie in Hollywood.