Lee Jin-ki (이진기; born December 14, 1989), known professionally as Onew (온유), is a South Korean singer-songwriter and actor under SM Entertainment. He is the leader of the South Korean boy group SHINee.

Aside from group activities, as a singer, he has participated in the original soundtracks for various TV series and released collaborations with various artists. He made his solo debut on December 5, 2018, with the release of his first mini album, Voice, which it peaked at number two on South Korea's Circle Album Chart. He released his second mini album Dice on April 11, 2022, which it peaked at number three on Circle Album Chart. He made his solo debut in Japan on July 6, 2022, with the release of his first studio album Life Goes On. He released his first Korean studio album Circle on March 6, 2023, which peaked at number three on Circle Album Chart. Onew has also contributed to songwriting for both himself and Shinee.

As an actor, Onew was cast in multiple musicals, such as Rock of Ages (2010), Shinheung Military Academy (2019), and Midnight Sun (2021–2022) and participated in various television dramas, mostly known for the roles of Baek Su in JTBC's sitcom Welcome to Royal Villa and the cardiothoracic resident Lee Chi-hoon in the popular KBS2 drama Descendants of the Sun (2016).