Yang Jeong-in (born February 8, 2001), know professionally as I.N, is a South Korean singer-songwriter under JYP Entertainment. He is the maknae of the South Korean boy group Stray Kids.

On January 16, 2021, he released the song "Maknae On Top" featuring Bang Chan and Changbin as part of the SKZ-PLAYER series. On December 21, 2022, I.N co-wrote and co-composed his solo song "Hug Me" for the best album SKZ-REPLAY.

In 2025, I.N released his first OST, partnering with fellow band mates Lee Know and Seungmin to produce and perform "START!", an opening included in the K-drama "Resident's Playbook".