Actor Joo Sang Wook's sister appeared in the news.

Joo Sang Wook on October 26, 2013, tweeted, "My sister's surprise appearance on the news for her research on doves' wings, I'm so proud of you my little sister!"

He linked the tweet to a video of his sister Joo Eun Jung's interview on News Desk. She was introduced as a researcher from Seoul University with an expert knowledge on birds' flights.

In fact, Joo Sang Wook on October 14, 2013, episode of SBS "Healing Camp" mentioned his sister, saying, "My older sister graduated from Yeonsei University, and my younger sister got her master's from Seoul University in computer science."

He added, "My sisters always read books and studied, and I didn't understand them."