SM offered Jung and her sister singing and dancing lessons in order to professionally train them for a music career.

[17] In 2011, Jung participated in and won first place in SBS's figure-skating show Kim Yuna's Kiss & Cry.

[11] In 2013, Jung starred in the SBS teen drama The Heirs, playing the role of a spoiled yet kind-hearted wealthy high school student.

[19] Her character in the show generated positive recognition among viewers, and she was voted as the Best Onscreen Couple along with CNBLUE's Kang Min-hyuk at the 2013 DramaFever Awards.

[25] She portrayed a girl who moves from the countryside to Seoul to pursue a music career and ends up meeting a fateful love during the process.

[26] Commenting on Jung's work attitude, Director Park Hyung-ki stated "Despite taking on a difficult character, she shows her determination to pull it off through her gaze to the point you can see sincerity in Krystal when she's in front of the camera.

[29] In 2015, Jung starred alongside actor Seo Jun-young in a 10-minute film entitled, Listen To My Song for W Korea's 10th anniversary.

[32] On February 12, 2017, it was reported that Jung would release the collaboration single "I Don't Wanna Love You" with Glen Check's member June One Kim.

[33] In July, Jung starred in tvN's drama spin-off of the Korean manga Bride of the Water God.

[34][35] The same year she starred in the black comedy drama Prison Playbook, produced by Reply PD Shin Won-ho; she received good reviews for her performance.

[44] In 2020, Jung was cast in OCN's military cinematic drama Search, where she played an elite army officer.

[54] In February 2024, Jung released cover song of Leila Hathaway's "I'm Coming Back" through Soundcloud and also confirmed to joined the label Beasts & Natives (BANA).