Jun Hyo-seong (Hangul: 전효성; born October 13, 1989), often simply known as Hyoseong or Hyosung, is a South Korean singer and actress. She is best known for being the leader, main dancer, and lead vocalist of popular South Korean girl group SECRET.

In 2005 she became a finalist on Mnet's "Battle Shinhwa" which led to her signing a recording contract with Good Entertainment. In 2007 she was to debut in the group 'Five Girls' along with G.NA, Wonder Girls' Yubin, After School's UEE, and former T-ara member and former Spica member Yang Jiwon. However, the group disbanded before they were able to debut due to the company's financial problems. Hyoseong was later discovered by TS Entertainment through a show that was aired on SBS MTV called "Diary of Five Girls" and spent two years in the company as a trainee. In 2009, she debuted with Song Jieun, Han Sunhwa and Jung Hana as the four-member girl group SECRET. SECRET officially disbanded in 2018. Hyoseong debuted as a solo artist in 2014.

Birth name: Jun Hyoseong (Hangul: 전효성)
Born: October 13, 1989 in Cheongju, Chungcheongbuk-do, South Korea
Genres: R&B, pop, hip hop
Occupations: Singer, actress
Instruments: Vocals
Years active: 2007–present
Labels : TS Entertainment (2008-2018), Tommy & Partners Entertainment (2018-present) Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.