She made her acting debut in 2017, since then, she has appeared in number of films and television series.
She is known for her various roles as child actor as: My Secret Terrius (2018) and Itaewon Class (2020).
[2][3] In 2022 she appeared in romantic TV series Twenty-Five Twenty-One.
In 2018, she won the Best Young Actress award at 2018 MBC Drama Awards for her role of Cha Joon-hee in mystery drama My Secret Terrius.
[4] Ok Ye-rin participated at the 'One K Concert for the 100th Anniversary of the March 1st Movement' held at the National Assembly in Yeouido, Seoul on March 1, 2019 and sang "Where the Wind Blows".