In 2008, the year she turned 25, while studying mathematics at MIT, she was admitted to the Wharton doctoral program. In 2009, she published the essay collection Dongju’s Story about 12 years of life studying in the United States. In 2018, she graduated from the University of San Francisco School of Law, and in September she took her first regular spot on a TV program, TV Chosun La La Land.
The breakthrough yearThe year she turned 36, she posted in May about passing the California bar exam. After an October interview on Section TV Entertainment Relay, she appeared with her mother on MBC Every1 Video Star on Nov. 5, and reached the portal real-time search rankings after the broadcast. She also signed with an agency.
In 2020, she published the essay San Francisco Stranger, and at the end of December she announced she would work as a partner attorney at a Korean law firm from the next year. In 2021, she published Seo Dong-joo’s Study Method for Passing. In 2022, she signed with Onesta Company and played for FC Bulnabang on Kick a Goal.
Netflix The Devil’s Plan was released on Sept. 26, 2023, and she finished third. In December, the U.K.’s NME ran an interview about it on its homepage.
In August 2024, she announced her marriage. On June 29, 2025, she remarried, and in September she appeared on Boss in the Mirror.
In 2026, she was a special MC on Stars’ Top Recipe at Fun-Staurant and appeared on Namgyeoseo Mwohage and Han Moon-chul’s Black Box Review.
Seo Dong-joo (born Mar 28, 1983) published the essay collection Dongju’s Story in 2009, the year she turned 26, and became known on Nov 5, 2019, the year she turned 36, when she appeared on MBC Every1 Video Star. In 2023, the year she turned 40, she finished third on Netflix The Devil’s Plan.
Ages are by calendar year (the year minus the birth year), birthdays aside.
The report says she was studying mathematics at MIT at the time and would enroll right after graduating in June.
Source 01 · Korea Economic Daily (Korean) · Admitted to Wharton doctoral program · opens in a new tab The date of admission is not in the article, so the report date is given.An essay collection about 12 years of life studying in the United States.
Source 02 · MyDaily (Korean) · Interview on her essay collection · opens in a new tabSource 03 · Sports Chosun (Korean) · Dongju’s Story · opens in a new tabSource 18 · Wikipedia (Korean) · Seo Dong-ju · opens in a new tab Articles in January 2009 reported the publication. Wikipedia gives August 2008, which conflicts, and the exact date could not be confirmed.Newsis reports that she posted a graduation photo on Instagram.
Source 05 · Newsis (Korean) · Graduates from law school · opens in a new tab The graduation date is not in the article, so only the month is given, based on the report date (May 28).A reality show, full title Kkumkkuneun Saramdeuri Tteonan Dosi – La La Land, that follows the daily lives of single women. Seoul Shinmun reports it was her first regular spot on a TV program.
Source 04 · Mediapen (Korean) · First broadcast of La La Land · opens in a new tabSource 06 · Seoul Shinmun (Korean) · Cast in La La Land confirmed · opens in a new tabPosted her thoughts on passing on her blog.
Source 07 · Sports Kyunghyang (Korean) · Her thoughts on passing the bar exam · opens in a new tab The date the result was announced is not in the article, so the date of the post is given.Talked about the U.S. bar exam and said she planned to keep her main job as an attorney while appearing on TV when the chance came.
Source 08 · Maeil Business (Korean) · Section TV Entertainment Relay · opens in a new tabAppeared as a guest with her mother, Seo Jung-hee. Sports Chosun reports that she reached the portal real-time search rankings after the broadcast. She said she had signed with an agency and that this broadcast was the start of her full-scale TV work.
A book of diary entries she wrote on her blog.
Source 12 · Donga.com (Korean) · Essay San Francisco Stranger · opens in a new tabSource 18 · Wikipedia (Korean) · Seo Dong-ju · opens in a new tab The date is based on an article announcing the coming publication, and Wikipedia also gives July 2020.Announced on Instagram that she would work as a partner attorney at a law firm in Korea from January 2021. She also announced a self-improvement planner and a study-method book.
Source 13 · Xports News (Korean) · New Year plans · opens in a new tabA book about her path to becoming a U.S. attorney and her study methods.
Source 14 · Sports Kyunghyang (Korean) · Seo Dong-joo’s Study Method for Passing · opens in a new tab Her agency announced the publication on Apr. 20, and the publication date could not be confirmed.Sports Kyunghyang reports that she is also a member of FC Bulnabang on SBS Kick a Goal, a women’s soccer variety show.
Source 15 · Sports Kyunghyang (Korean) · Contract with Onesta Company · opens in a new tab The article says only that the contract was recent, so the reported month, June, is given.Appeared as one of 12 players and finished third. Maeil Business reports that in the six days after its release the series ranked No. 3 on the global Top 10 TV (non-English) list.
Source 16 · Maeil Business (Korean) · Interview on The Devil’s Plan · opens in a new tabSource 17 · Hankook Ilbo (Korean) · Standout performance on The Devil’s Plan · opens in a new tabThe British music magazine NME ran an interview about her appearance on The Devil’s Plan on its homepage.
Source 19 · Star News (Korean) · NME interview · opens in a new tabAnnounced on Instagram her marriage to a boyfriend who is not a celebrity.
Source 20 · Biz Enter (Korean) · Marriage announced · opens in a new tabHeld a wedding in Seongnam, Gyeonggi.
Source 21 · Maeil Business (Korean) · Remarriage · opens in a new tabAppeared as a guest and talked about her university days in the United States.
Source 22 · Maeil Business (Korean) · Boss in the Mirror · opens in a new tabAppeared as a special MC.
Source 23 · Money Today (Korean) · Stars’ Top Recipe at Fun-Staurant · opens in a new tabAppeared with her mother, Seo Jung-hee. She said she only advises the company she works for on U.S. legal matters and also does TV and painting.
Source 24 · Sports Seoul (Korean) · Namgyeoseo Mwohage · opens in a new tabAppeared as an attorney and TV personality.
Source 25 · Newsen (Korean) · Han Moon-chul’s Black Box Review · opens in a new tabEND OF SELECTED RECORDSSelected records, 2008–2026 · not a complete list of work. “Key moment” is an editorial label, not a measure of success.
What did they do, and at what age?
AgeTrail lines up the key moments of a life by age.
Debut and breakthrough are marked separately, and every record has a source.
Film & TV · South Korea
Mar 28, 1983 —
Ages are counted from the birth year 1983: the year of the event minus 1983, birthdays aside. “Key moment” labels and the connecting story are AgeTrail's editorial reading.
Fact-checked: 2026.09.30 · An independent archive, not affiliated with the person or their agency.