When she was 14, Kim So-yeon entered the Miss Binggrae beauty pageant without her parents' approval. She had no makeup, so she used a
marker pen as her
eyeliner and ended up winning the top prize, thus launching her entertainment career. She debuted with a role in the
SBS Drama
Dinosaur Teacher, and continued to star in popular TV shows such as
Reporting for Duty (1996) and
Soonpoong Clinic (1998). She also hosted the music program
Inkigayo and appeared in numerous commercials, becoming the first Korean teen star to earn more than from commercial modeling. However, being
typecast as prim, cold-hearted characters had a negative effect on Kim's career, and her fame went downhill in the mid-2000s. Her attempt to crossover to China via Hong Kong director
Tsui Hark's
wuxia film
Seven Swords (in which she played a
Joseon noblewoman-turned-slave) and the
Chinese dramas
Just Like a Beautiful Flying Butterfly and
Anhui Merchants also proved unsuccessful. Kim took a break for three years, questioning whether she wanted to continue being an actress. She returned to television in 2008 with
Gourmet (adapted from
Huh Young-man's
titular manhwa). A year later, Kim's career saw a resurgence with the 2009 high-budget series
Iris. '' in 2010 Kim was cast in the leading role in romantic comedy
Prosecutor Princess in 2010 and showcased her versatility by playing a
Legally Blonde-inspired newbie district attorney who's initially more interested in shopping and dating, yet surprises her colleagues with her intelligence and learns to strive for justice. Kim said that the cheerful, unpredictable character was similar to her own real-life personality. Later in the year, she played a rigid doctor in sports drama
Dr. Champ. In 2012, Kim appeared on the big screen as a royal
barista embroiled in a plot to assassinate
Emperor Gojong in
Gabi, adapted from the
historical fiction novel by
Kim Takhwan. She spent months studying the
Russian language and coffee brewing even before shooting began.
Gabi was Kim's first Korean feature film in 15 years, since
Change in 1997. This was followed by another period drama
The Great Seer, where she played a healer in
Goryeo. Kim reunited with
Prosecutor Princess screenwriter
So Hyun-kyung in
Two Weeks (2013), in the role of a prosecutor who teams up with a fugitive to bring down a corrupt politician and her gangster henchman. In 2014, she played a fashion merchandiser who falls for her much younger childhood friend in
I Need Romance 3. Kim then appeared in the "Female Soldier Special" of
military boot camp reality show Real Men. In 2015, she starred in her second cable series
Beating Again, about a businessman who falls for his secretary after he gets a heart transplant. Kim also joined the
fourth season of
We Got Married, pairing up with
Kwak Si-yang. In 2016, Kim starred MBC's weekend drama
Happy Home, playing a mother who has lost her son in an accident. In March 2018, Kim left her previous agency
Namoo Actors and signed an exclusive contract with J Wide Company on April 3, 2018. She was then cast in SBS weekend drama
Secret Mother. press conference in 2019 In March 2019, Kim returned to small screen with the
KBS weekend drama
Mother of Mine. In 2020, she starred in the
SBS TV series
The Penthouse: War in Life, playing the role of a wicked but famous soprano and musical school director. Kim compared the role to her famous villain role in
All About Eve 20 years earlier, commenting "The goal for this drama is that when people think of a female villain, they think of Cheon Seo-jin, just like how Heo Young-mi was remembered." The series drew a peak viewership rating of 28.8% nationwide, and was renewed for 2 more seasons, where Kim reprised her role. Additionally, Kim won the
Award for Best Actress – Television at the
57th Baeksang Arts Awards and the Grand Prize (
Daesang) at
2021 SBS Drama Awards. In 2023, Kim made a special appearance in the SBS drama
Taxi Driver 2 playing the role of the organization's first deluxe taxi driver. She was cast as the female lead for the
tvN drama
Tale of the Nine Tailed 1938 alongside actor
Lee Dong-wook. She made a special appearance as "Ryu Hong-joo" for the SBS drama
The Escape of the Seven. In 2024, Kim was cast for the
JTBC drama
A Virtuous Business, as a housewife who sells adult products. ==Personal life==