Oh Yeon-soo made her debut in 1989 among a batch of actors who passed an open audition by broadcaster MBC, and she soon became popular for her innocent image.

[2] But since her marriage to fellow actor Son Ji-chang,[3] Oh has had a career renaissance doing more mature roles.

She played a single mother who rediscovers love in A Second Proposal,[4] a discontented housewife in a rivalry with a top ballerina in The Queen Returns,[5][6] and was cast as strong, supporting characters in the historical dramas Jumong,[7] and Gyebaek.

[8] But Oh became best known for memorably portraying married women exploring adultery in the dark melodramas Bitter Sweet Life,[9][10] and Bad Guy.

She portrayed a villainous military division commander who was the very first woman to achieve that position since the army founding.