Though filming has already started, Lee Seo Won has officially left the series following his recent scandal in which he sexually molested a female colleague and threatened her with a weapon. On May 17, insiders revealed Dongjun was in talks to join the cast as Lee Seo Won's replacement, and tvN has now confirmed the news.
tvN stated, "We've finalized Dongjun's casting. He's canceled everything in his schedule to start filming with us, so we will begin re-shooting soon. We'll make sure there are no disruptions to the existing broadcast schedule, and we'll try our best to show viewers a great production. Thank you."
'About Time' starring Lee Sung Kyung and Lee Sang Yoon is scheduled to air in end of May.