The first trainee to be revealed as a member of Cube Entertainment's new girl group was Son Na-eun, who was featured in labelmate Beast's "Soom" (숨; "Breath"), "Beautiful" and "Niga Jeil Joha" (니가 제일 좋아; "I Like You the Best") music videos in late 2010. The second member revealed was the group's leader, Park Cho-rong, who was shown at the end of Beast's "Shock" Japanese music video. It was later revealed that the new girl group would be managed by a sub-division of Cube Entertainment known as A Cube Entertainment. On February 21, A Cube Entertainment set up an official Twitter account and revealed Oh Ha-young as the third member of Apink. Jung Eun-ji was the fourth member revealed through A Cube's Twitter through a video of her singing a rendition of Jennifer Hudson's "Love You I Do". Hong Yoo-kyung was similarly revealed through an online video where she was playing the piano. Yoon Bomi and Kim Nam-joo were the last members to be revealed through Twitter.
Prior to the group's debut, the documentary Apink News aired on the Korean cable channel TrendE. The show chronicled the debut process of the members of Apink. The pilot episode of Apink News was aired on March 11. Each episode featured a different celebrity guest as its anchorman. Among the celebrity guests of the show were G.NA, Mario, MBLAQ's Seung Ho and G.O, Beast, 4minute, 2AM's Jinwoon, Infinite's Sunggyu and Sungjong, and Secret's Sunhwa and Hyoseong.
