[7] Yoon was the representative of Gyeonggi Province at the Miss Korea beauty pageant in 2000,[8] then lived in obscurity for several years while trying to find work as an actress.

[12] Yoon married a then-unnamed office worker, who was six years older than her, in a private wedding ceremony held on May 30, 2015 at a resort in Bali, Indonesia.

On December 1, 2023, Yoon's husband, Lee Jun-ho, was revealed as the Kakao Entertainment executive being investigated since November 30 for allegations of breach of trust under the Special Police Act.

Lee is the head of Kakao Entertainment's investment strategy division, and prior to that was the former president and chief executive officer of its television production subsidiary Mega Monster from 2017 to 2019.

[2][3] On March 7, 2022, Yoon donated 50 million won to the Hope Bridge Disaster Relief Association to help the victims of the massive wildfire that started in Uljin, Gyeongbuk and has spread to Samcheok, Gangwon.