The 51-year-old Law & Order: Special Victims Unit actress and 45-year-old Grey's Anatomy star are among several celebrities confirmed for the video. Swift announced the news by sharing photos of Hargitay and Pompeo as their alter egos, Justice and Luna, on Instagram.
Actresses Zendaya, Hailee Steinfeld, Lena Dunham, Serayah and Jessica Alba, singers Hayley Williams, Ellie Goulding and Kendrick Lamar, and models Lily Aldridge, Gigi Hadid, Karlie Kloss, Martha Hunt and Cara Delevingne are also attached to the project.
"Bad Blood" hails from Swift's fifth studio album, 1989, and is rumored to be about the singer's unfriendly relationship with fellow pop star Katy Perry. Swift will debut the star-studded music video at the 2015 Billboard Music Awards on May 17.
Swift is a big fan of Hargitay and Pompeo, and named her cats after the actresses' respective characters, Olivia and Meredith. Hargitay previously teased the singer by sharing a photo of herself in a cat collar, and took a selfie with Pompeo for Swift in February.