Jun Hyosung 전효성 is the leader, main dancer, and lead vocal of Secret.
Hyosung was born on Friday, October 13, 1989, in Cheongju-si, Chungcheongbuk-do. She's Secret's oldest member, and she's older than the maknae, Jieun, by 6 months and 22 days.
She was born in the Chinese Year of the Snake and her zodiac star sign is Libra. Her blood type is B.
At 160 cm or 5'3", she's the same height as Jieun. They're 3 cm taller than Hana.
She's attended Inha University. She has one older and one younger sister.
She almost debuted in 2007 in a group called Five Girls with G.NA, the Wonder Girls' Yubin, After School's UEE, and Spica's Jiwon. The group never debuted, and she moved on to form Secret.
When Hyosung was in 3rd grade, she and her family started delivering newspapers for extra money. When she was in 6th grade, she decided that she wanted to become a singer. In middle school, she was the leader of her school's dance team.
She was in the one-time unit group Dazzling Red for a special stage on SBS' "Inkigayo" in December of 2012. She performed with Hyuna, Kara's Nicole, After School's Nana, and Sistar's Hyorin.