Choi made his acting debut as a child actor, playing the younger version of Jo In-sung's character in the television series Piano (2001).
Choi gained recognition with his supporting roles as the protagonist's estranged son in fantasy drama Padam Padam (2011), a 20-year-old high school bully in the webtoon adaptation Puberty Medley (2013), a villain in disaster drama Missing 9 (2017), and a lawyer in romance comedy drama Suspicious Partner (2017). Choi also starred in the youth film Eclipse (2016) as the lead.[
Choi was a cast member of the virtual reality show We Got Married in 2016, pairing with Apink's Yoon Bo-mi. Choi became a permanent host on the Korean variety show Hello Counselor in September after being a guest two weeks in a row in August 2016.[
In 2018, Choi was cast in his first lead role on network television in the 2-episode drama special Exit. He was then cast in the romantic comedy series So I Married the Anti-fan as the male lead, based on the webtoon of the same name.[
Iron Family(2024)as Cha Tae Ung
Island(2022)as Kang Chan Hee
The Man's Voice(2021)as Baek Tae Hwa
So I Married My Anti-Fan(2021)as Hoo Joon
The Undateables(2018)as Choi Jun-soo
Mnet Asian Music Awards(1999)as Self - Presenter
Hello, Counselor(2010)as Self - Guest
Running Man(2010)as Self
