Kim Woo Bin And His Model Girlfriend Broke Up Shortly After "The Heirs" Ended

Last September Kim Woo Bin announced publicly that he was dating fashion model Yoo Ji Ahn. So fans were surprised to learn this week that the couple had broken up four months ago but decided to keep it private until now.

At the time that Kim Woo Bin went public with his relationship, his agency, Sidus HQ, said that the actor was not the type to try and hide anything. He and Yoo Ji Ahn dated openly and never tried to keep their relationship a secret.

"He does not feel uncomfortable about going public with his relationship," said the Sidus HQ representative at the time. "A young man and woman meeting in such a natural way is nothing to be secretive about."

But then Kim Woo Bin was not as famous a few months ago as he is now. Neither of them had ever made the headlines when they first started dating.

Kim Woo Bin and Yoo Ji Ahn met in 2011 at a magazine photo shoot. He had been working as a runway model since 2006 and appeared in several fashion shows before his debut in the drama "White Christmas." He then went on to have a role in "Gentleman's Dignity" followed by a leading role in "School 2013" and also a part in the film "Friend 2." That was followed by his role as bad boy Choi Young Do in "The Heirs." It was this role that propelled him to international stardom.

The five-foot-nine- elegant Yoo Ji Ahn is a top model and a popular presence on the runway for designers such as Chanel and Dior.

Her agency YG Entertainment did not disclose the reasons the couple broke up although some reports suggest it was their increasingly busy schedules that interfered with the relationship. They did say that the couple broke up four months ago but offered no explanation as to why this news was kept a secret until now.

Kim Woo Bin only announced their relationship in September of 2013 when they had already been dating for two years. Since then he has been on a whirlwind schedule of appearances in connection with his newfound popularity due to "The Heirs."

Is their relationship a victim of his increasing fame?

A recent comment that f(x) star and "The Heirs" co-star Krystal Jung was his ideal type have prompted some rumors that he liked her, but so far those are just rumors.