Actor Park Si-hoo denied allegations that he had introduced a woman to a married man and led the couple's marriage to break up, terming the charges "groundless and false.
In a statement made on Thursday, Park's agency, Hoofactory, said it would take immediate legal measures.
The agency stated that it has hired lawyers, sought mediation by the Korea Press Arbitration Commission, and will seek criminal action against the person who made the false accusations on the internet.
"We are collecting evidence on the continued spread of unverified false claims and malicious comments about Park Si-hoo," Hoofactory replied.
"We will pursue legal action, including criminal complaints, against these illegal acts. Given the serious damage such misinformation causes to the actor, no leniency will be granted."
The agency called on the public not to spread unsubstantiated rumors or libelous information. "We are doing our utmost to ensure a prompt police investigation and will prove through the legal process that the post is based on falsehoods," it further said.
The scandal started when an internet user, only known as "A," accused Park of introducing a woman to her husband and was said to have played a great role in the downfall of her family. The post contained a photo of the supposed woman.
The lady in the photo denied involvement, posting in a comment:
"I do not know any of the individuals mentioned in this post. Using my photo without permission and spreading false information constitutes clear defamation."
Park Si-hoo, one of the actors who made his debut in 2005 in Delightful Girl, Choon-hyang of KBS, has played lead roles in hit dramas such as Prosecutor Princess, The Princess' Man, Cheongdamdong Alice, and My Golden Life.
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