DIA (/ˈdaɪə/; Korean: 다이아; shortened from DIAMOND and backronym for Do It Amazing) is a South Korean girl group formed by MBK Entertainment. The group is currently composed of seven members: Eunice, Jueun, Huihyeon, Yebin, Chaeyeon, Eunchae, and Somyi. DIA officially debuted on September 17, 2015, with their lead single "Somehow" from debut album Do It Amazing.
Seunghee left the group in April of 2016. In May 2018, Eunjin decided to leave the group. Jenny also left the group in July 2019.