Choi Dong Wook, better known by his stage name Se7en, is a South Korean singer who has also advanced into Japan, China and the United States.Se7en began training under the management agency YG Entertainment at the age of fifteen. After four years of training in singing and dancing, he made his debut in 2003 with "Come Back To Me". He then released his debut album "Just Listen" on March 8, 2003. Later that year, he received the Best Newcomer Award from MNET.

Se7en made an official comeback in Korea after a 3-year-long hiatus on July 31, 2010, with his 1st mini-album, "Digital Bounce".

On March 18, 2013, Se7en enlisted for his mandatory military service. Se7en was discharged from his mandatory military service on December 28, 2014. Se7en was under investigation for allegedly visiting a massage parlour famous for prostitution whilst on military duty on June 22, 2013. It was decided that he broke curfew trying to get massages. Se7en allegedly visited several parlours that were closed before he found one that was open late. He left as soon as he realized that it was a parlour for prostitution. Se7en received ten days in military jail for his actions. During his military service, the singer's contract with YG Entertainment expired in February 2015. It was later confirmed that they mutually agreed not to renew the singer's contract.

In June 2009, Se7en acknowledged on his website that he and actress Park Han Byul had been in a relationship for seven years, with the couple having first met when they were seniors in high school. Se7en had previously denied rumors that they were a couple in order to protect Park's privacy and let the relationship grow naturally. On December 23, 2014, a statement was released by Park Han Byul's agency stating that Park and Se7en had ended their 12-year relationship earlier that year.

It was revealed on April 17, 2020, that he had signed with DMOST Entertainment. He is currently promoting actively through musicals, variety shows, etc.

He and actress Lee Da Hae married on May 6, 2023.

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