Lee, 48, who played the father of a wealthy family in the film, was found during a search operation after he was reported missing, according to a rescue worker who spoke on condition of anonymity to the news agency.
Most recently, the actor was part of an investigation into allegations of illegal drug use. The police have questioned him on three occasions, one of which lasted over 19 hours this weekend.
The actor has said that he was tricked into taking drugs by a bar hostess who tried to blackmail him, reports Yonhap news agency.