Lee Si Un has been dating Seo Ji Seung, a hoobae actress 6 years younger, for approximately 5 months. His response to the news spreading online was, "I was super shocked to see my own dating news. I am thankful for the massive attention."

When asked to boast about his girlfriend a little, Lee Si Un shared, "She is pretty, and a person with a kind disposition. I will maintain a good relationship with her." 

Lee Si Un debuted in 2008 with 'Friend, Our Legend', while Seo Ji Seung debuted in 2005 with 'Sharp #2'. Congratulations again to the couple.