Jessica Sooyoun Jung (born April 18, 1989), known professionally as Jessica, is an American singer, actress, songwriter, fashion designer, and businesswoman currently based in South Korea. She was born and raised in San Francisco, California. At the age of eleven, Jessica was discovered by South Korean entertainment agency S.M. Entertainment and subsequently moved to South Korea. Following seven years of training under S.M. Entertainment, she debuted as a member of South Korean girl group Girls' Generation in 2007. The group would later go on to be one of the best-selling artists in South Korea and one of South Korea's most popular girl group nationwide as well as worldwide.

Apart from Girls' Generation's music activities, Jessica also participated in acting. She portrayed Elle Woods in the Korean-language version of Legally Blonde in 2010, and made her acting debut with the drama Wild Romance in 2012. In early 2014, Jessica established her own fashion brand Blanc & Eclare. Later that year, she was dismissed from the group due to conflicts between the group's schedule and her own business activities. Following the dismissal, Jessica ended her contract with S.M. Entertainment and later signed with Coridel Entertainment in 2016 to release her debut solo album, With Love, J.