Woon-jung "Chella" Choi (born 25 August 1990) is a South Korean professional golfer.
Choi played on the Duramed Futures Tour in 2008 with a best finish of T-2 at the Bright House Networks Open. She earned her 2009 LPGA Tour card at LPGA Final Qualifying Tournament, having to earn her card through a playoff.
Her first professional victory came on 19 July 2015, at the LPGA Tour's Marathon Classic, where she defeated Jang Ha-na in a playoff. The win happened after seven years and 157 LPGA Tour events. For the first eight years of Choi's professional career, her father was her caddie and vowed to remain until she won.