She may be known as Ace Ji-hyo in Running Man for her ability to accomplish difficult missions and Mong Ji-hyo for her signature blank expression.

South Korean actress Song Ji-hyo may have a new nickname soon — Queen of the sea.

In the latest episode of South Korean variety show Running Man, which aired last Sunday (July 16), the 41-year-old revealed that her parents run a ferry business in Tongyeong, which is a port city in South Gyeongsang province in the country.

It started off when the members were taking a break and preparing to play the next game segment.

They were sitting around to chat when the topic of their family background was brought up.

Comedian and television presenter Ji Suk-jin said: "Isn't Ji-hyo from a rich family?"

"Of course! Her family is super rich," replied singer Kim Jong-kook.

Host Yoo Jae-seok interrupted and asked Suk-jin why he would ask that question and that Suk-jin is from a rich family himself.

Suk-jin retorted by saying that he is a "self-made" person, with Jae-seok adding that Suk-jin's father was once the owner of a copper pipe factory.