Secret Affair is a 2014 South Korean television series starring Kim Hee-ae and Yoo Ah-in. It aired on cable channel JTBC from March 17 to May 13, 2014 on Mondays and Tuesdays at 21:50 (KST) for 16 episodes.

Kim Hee-ae is a South Korean actress. She is best known for her leading roles in Korean dramas such as Sons and Daughters (1992), Perfect Love (2003), My Husband's Woman (2007), How Long I've Kissed (2012), Secret Affair (2014), and The World of the Married (2020). She has received multiple acting awards including two Daesang and four Best Actress Awards for Television at the Baeksang Arts Awards. In 2020, she was selected as Gallup Korea's Television Actor of the Year.