Michael Ian Olmo (born March 25, 1999), known professionally as Iann Dior (stylized in all lowercase), is an American rapper, singer, and songwriter. Olmo is most well-known for his 2020 hit single "Mood", a collaboration with fellow American rapper 24kGoldn. The song peaked at number one on the Billboard Hot 100 and became his first and highest-charting song to date. Olmo's other popular songs include "emotions", "gone girl" (with Trippie Redd), "Sick and Tired" (with Machine Gun Kelly and Travis Barker), and "Prospect" (with Lil Baby). Olmo has released 1 mixtape ("nothings ever good enough"), 1 studio album ("Industry Plant"), and 2 EPs ("I'm Gone" and "Still Here"). His second studio album, "On To Better Things", is expected to be released in early 2022.