YG Entertainment originally planned to make the group consisting of three members of the Dara, Korean Actress Goo Hye Sun and Park Bom but in 2009 Dara and Bom put in 2NE1. On May 6, 2009 Dara and her group 2NE1 released their single debut title "Fire". On May 17, 2009 they debuted on stage with their single debuted "Fire" at SBS Inkigayo. On September 6, 2009 Dara released her first digital single titled "Kiss". The song featured her labelmate CL as a rapper and was used in a commercial for CF Beer with Korean Actor Lee Min Ho. Before debut with 2NE1, Dara was cast in a Television Drama The Return of Iljimae as Rie, and she also starred in Gummy's music video for "I'm Sorry" with her labelmate Big Bang T.O.P.
Dara and Bom is a member of the weakest in terms of dance, the reverse with Minzy. Dara frequently asked CL to assess her dance before their gig. CL gladly help Dara fix wrong move. Dara 95% always included into the 10 most beautiful idol in South Korea. Dara is also included in the five idol whose face was most desired by another idol with Girls' Generation Yoona and Jessica, Wonder Girls Sohee, T-ara Eunjung. Dara is in position number 2 after Girls' Generation Taeyeon as an idol who want to do out in the winter by netizen. Dara is often rumored to have close ties to the Big Bang G-Dragon. Dara has never expressly dismissed the rumor that makes fans wonder. Dara also choose G-Dragon as her ideal type, because according to Dara, G-Dragon is a gentle man. G-Dragon revealed that he really likes MV Dara in In or Out, G-Dragon even memorized the dance and lyrics while the song with Filipino and English language.