Jeong Yu-mi made her entertainment debut in a Lotte Xylitol chewing gum commercial in 2003. After playing minor roles in several TV series and movies, she became a household name when she portrayed a gentle girlfriend in A Thousand Days’ Promise (2011) and a scheming secretary in Rooftop Prince (2012).

Having previously appeared in the Chinese drama Five Star Hotel (2007), Jeong starred opposite Leon Lai and Gao Yuanyuan in the Chinese film Nobleman’s Path (2012).

Jeong was cast in the revenge manhwa-turned-TV series City Conquest, but the project was eventually cancelled after it couldn’t secure a time slot. Instead, she starred in the family drama Wonderful Mama (2013) in her first leading role.

In September 2013, Jeong joined the season 4 cast of dating reality show We Got Married, where she was paired with singer Jung Joon-young. She later appeared in the music video for Jung’s single “The Sense of an Ending.”Jeong next headlined the daily drama Mother’s Garden (2014) and period drama Maids (2015).