Choi Yoo-jung (최유정) is the main rapper, main dancer, lead vocalist, and face of the group, Weki Meki under Fantagio Entertainment. She was first known for appearing and ranking third on the hit survival show Produce 101 which qualified her to become a member of the project group I.O.I.
She debuted as a member of I.O.I on May 4, 2016 with their first mini album Chrysalis. On January 29, 2017, the group disbanded following the release of their third and final digital single "Downpour".
She debuted as a member of Weki Meki on August 8, 2017 with their first mini album Weme.
In 2019, she became a contestant on the vocal reality survival show V-1. She was eliminated in the first round after losing to her fellow member Suyeon.
On September 14th, 2022, she made her debut solo with the Single Album 'Sunflower'.