She is best known for her leading roles in the films Temptation of Wolves (2004) and My Tutor Friend 2 (2007), as well as the cable dramas Cool Guys, Hot Ramen (2011), VIP (2019) and Celebrity (2023).

Lee Chung-ah began her acting career by playing supporting roles in the films Resurrection of the Little Match Girl (2002) and Happy Ero Christmas (2003).

[5] A year later, she was cast in Kim Jee-woon's kimchi western The Good, the Bad, the Weird (2008) in a small role as the foster sister of Jung Woo-sung's character.

She later showed her horseback riding skills in Chosun Police Season 2, a series set during the reign of Emperor Gojong in which she played a damo with a dark past.

[9][10] Cool Guys, Hot Ramen received solid ratings for a Korean cable drama, and became the first of tvN's "flower boy" programming, which included Dating Agency: Cyrano on which Lee made a guest appearance in 2013.

Adapted from the webtoon of the same title, she played a detective with a delinquent credit history who helps kill a serial killer in exchange for an organ transplant for her ill mother.