K-pop group DIA now has nine members, with the addition of Jooeun and Somi.

Yebin of DIA made the announcement Wednesday through a hand-written letter on the group’s official fan site.

Jooeun is already known to the public through her previous appearance in SBS’ audition program “K-pop Star.” She was in the spotlight for her musical talent with the piano. Somi will be the youngest member of the group.

(MBK Entertainment)

As a nine-member group, DIA will release its second full-length album titled “YOLO” on Friday. It will prerelease a song, “Flower, Moon, Alcohol,” from the album Thursday.

DIA plans to meet with fans at “DIA’s treble clef concert” Friday to perform new songs from the album. The group also begins its first reality program “DIA’s YOLO Trip” on Sunday.

By Im Eun-byel (silverstar@heraldcorp.com)