On February 28, 2014, Choi married actress Shim Yi-young in the Grand Ballroom of the COEX Walkerhill Hotel in Samseong-dong. Choi and Shim met while filming A Hundred Year Legacy, a 2013 TV series in which they played a married couple. The two began dating after that film's completion. They have one son together. Shim Yi-hyun was born in January 2015. Choi Won is known for her role as Go Eun-ah in SBS' medical drama Doctor Stranger. She has also starred in films such as The King of Pigs (2012), Memories of Murder (2013), and The Wig (2014). Shim Yi-young is best known for her role as Soo-ah in MBC's historical drama The Queen's Gambit. Before starring in those dramas, she had small roles in several other television series including My Love from the Star, City Hunter, and Sweet & Sour Idea. She also appeared in several films including Memoir of a Geisha, When a Man Falls in Love, and The Face Reader. Shim received a Best New Actress nomination at the 45th Baeksang Arts Awards for her performance in The Queen's Gambit but didn't win. Shim then went on to star in cable TV series The Good Wife and Chicago P.D..