Actress Go Hyun Jung has apologized to her former co-star Jo In Sung for involving them in a dating scandal. She was joking.

"I apologize to Jo In Sung," Go said.

There is no truth to the dating rumors, the stars have repeatedly said, but it was inevitable that their believable romantic scenes in the 2005 drama "Spring Days" would lead to such long-lived rumors. Their chemistry was so good that it helped boost the drama's ratings to an impressive 30 percent of the viewers.

The actress made her apology on the December 29 episode of the Go Hyun Jung Reality Show. She reminisced about the first round of dating rumors, which took place while they were filming the popular drama "Spring Days."

"After articles claiming we were dating were published, Jo In Sung asked me if I was dating someone else named Jo In Sung," said Go. "He told me to stop using him and introduce him to the other lucky guy."

The actors have remained friends for 10 years. He was the first guest she invited on her talk show. They also met for tea before he entered the military for his mandatory two-year duty. In 2008 when she appeared on the MBC radio Show "Park Kyung Lim's Starry Night" she admitted that she has joked with Jo In Sung about their chemistry.

"I sometimes jokingly tell him that I love him and ask him to marry me," she said.

The dating rumors revived in July 2015 when the actors were seen together in a Japanese airport. Both their agencies denied the rumors saying the actors were coincidentally both in Japan for work and ran into each other at the airport.

Go Hyun Jung appeared in "Sandglass," one of the highest-rated and most critically acclaimed dramas in Korean TV history. She also enjoyed success with the 2009 drama "Queen Seonduk" and the 2010 drama "Daemul." In 2014 she began teaching acting as an adjunct professor at her alma mater Dongguk University.

Jo In Sung recently enjoyed success with the dramas "It's Okay That's Love" with co-star Gong Hyo Jin and "That Winter The Wind Blows" with Song Hye Kyo.

Jo In Sung dated actress Kim Min Hee for over a year but broke up around the time he was filming "It's Okay That's Love." At that time he was rumored to be seeing his co-star Gong Hyo Jin, who also broke up with her boyfriend Lee Jin Wook. Both actors denied the rumors.

In October it was reported that Jo was considering a cameo in an as-yet-unnamed project that Go Hyun Jung would appear in.