• Birthplace: Suwon, South Korea
• Age: 27
• Height: 169
• Weight: 48
• Website: N/A

Yoo Jeong-yeon (정연) was born as Yoo Kyung-wan (유경완) on November 1, 1996 (age 21) in Suwon, South Korea. She is one of the lead vocalists of the Kpop girl group TWICE. She is better known as simply Jeongyeon.

She joined the company after passing the JYP Entertainment's 6th Open Audition on March 1, 2010. Like Nayeon, Jihyo and Sana, she was originally set to debut in a group called 6mix , but unfortunately their debut was cancelled and now she's a well-known member of TWICE. In 2014, she appeared with Nayeon in the music video of Got7's "Girls Girls Girls" and, in 2015, appeared in miss A's "Only You" music video. She and her sister were the hosts of Inkigayo from July 3, 2016 to January 22, 2017. Jeongyeon won the Female Rookie Award at the 2016 SAF SBS Entertainment Awards.