Actor Jung Woo Sung finally opened up about his ex-lover Lee Ji Ah during his recording for 'Knee-Drop Guru'.

According to staff members of the show, Jung Woo Sung calmly spoke about this sensitive topic that he probably wanted to avoid.

Jung Woo Sung stated, "To be honest, I already knew about Lee Ji Ah's marriage to Seo Taiji. She told me all about it when we traveled to France." His honest statement caused quite a shock among everyone on the set.

In the beginning of last year, photos of Jung Woo Sung and Lee Ji Ah traveling together surfaced online, leading to their dating announcement. However a few months later, news of Lee Ji Ah and Seo Taiji's previous 14-year secret marriage and divorce complications were revealed shocking the public and the industry. Jung Woo Sung, who was dating Lee Ji Ah at the time, was also hit by this spotlight and the two eventually ended their relationship.

During the time, there were many news articles that revolved around the shock Jung Woo Sung must have received at the news. In reality however, he was having even a harder time because he already knew about Lee Ji Ah's past marriage before it blew up in the media. Since then, he kept on the down-low and avoided the topic as much as possible.

According to another staff member, "Jung Woo Sung showed up to 'Knee-Drop Guru not as the actor Jung Woo Sung but the human Jung Woo Sung. He was not the Jung Woo Sung who receives love from the people but the Jung Woo Sung who once sincerely loved a woman."

This first episode of 'Knee-Drop Guru' after Kang Ho Dong's return with Jung Woo Sung as the guest will air on the 29th.