SIS is KATSEYE's first album, released on August 16, 2024. This album introduces the six-member global girl group, and revolves around exploring the duality of strength and vulnerability within girlhood and womanhood. Their tracklist includes the songs Debut, Touch, My Way, I'm Pretty, and Tonight I might. The most popular and streamed song of this album is "Touch". By October 15, 2024, it had surpassed 100 million streams on Spotify, making it KATSEYE's first song to achieve this milestone.
KATSEYE'S second extended play "Beautiful Chaos", was released on June 27, 2025, under Hybe UMG and Geffen Records. Beautiful Chaos showcases a dynamic blend of pop and R&B influences, with the group experimenting with various genres to create a sound that's both fresh and reflective of their growth. The EP features five tracks; Gnarly, Gabriela, Gameboy, Mean Girls, and M.I.A. The most streamed song from Beautiful Chaos is "Gnarly". This track not only marked their entry into the Billboard Hot 100 but also garnered significant streaming numbers across various platforms.