Jun Hyo Seong

• First Name: Hyo Sung
• Family Name: Jeon
• Native name: 전효성
• Also Known as: Jeon Hyosung;Jeon Hyo Seong;Jun Hyo Seong;Jun Hyo Sung
• Nationality: South Korean
• Gender: Female
• Born: October 13, 1989

Jeon Hyo Sung is a South Korean idol singer and dancer. She is best known as the leader of a popular South Korean girl group, Secret.