Guess Who

Guess Who (stylized as GUE?? WHO) is ITZY's fourth mini album, released on April 30, 2021 by JYP Entertainment. It contains six tracks, including the title track "In the Morning".

Produced by J.Y. Park, Earattack and JQ, Guess Who is primarily a rap-styled K-pop record that combines EDM, hip hop, dance, dance-pop, trap, Latin trap and bossa nova elements. According to the group members, the title of Guess Who refers to how they show different emotions and personas in the songs while exploring their musicality.

The album was commercially successful, marking ITZY's first entry on the US Billboard 200, peaking at number 148, and peaking at number 2 on the Gaon Album Chart. In May 2021, the album was certified Platinum.