Lee Sang Yoon and Nam Sang Mi Brake Up.

Actor Lee Sang Yoon and actress Nam Sang Mi have decided to end their relationship after 18 months.

The actor's agency revealed on January 7th, that they couple have broken up due to their hectic lives. “They simply did not have time for each other”, they said.

They also said that the two ended their relationship on December, but they remain friends.

The actors met in 2010, in the drama “Life is Beautiful” where they acted as a couple. Their feelings also developed in real life and they announced they were dating in June of the same year.

Nam Sang Mi appear in the tvN program “Taxi” where she opened up about her relationship.

Last time they went out publicly was in October, when they attended the VIP premiere of her movie “The Peach Tree”.