Jang Ja-yeon (Korean: ???; 25 January 1980 – 7 March 2009) was a South Korean actress.
She was born in Jeongeup, North Jeolla Province, South Korea.
She debuted in the entertainment industry when she appeared in a television commercial in 2006.
She was known for being part of the KBS television drama series Boys Over Flowers as Sunny, one of the antagonists of the series.
At the time of her death at the age of 29, Jang had been starring in Boys Over Flowers.
She had been suffering from depression, and it was revealed in 2019 that the initial investigation into her death in 2009 was corrupted and false.
The 2009 investigation concluded that her death was a suicide at first, and was reopened in 2018.
Her death caused a national scandal in 2009 when it was widely spread by the media that she had been sexually and physically abused by a number of prominent entertainment executives during her career, most importantly the CEO of Jang's former talent agency, The Contents Entertainment, Kim Sung-hoon.
After three witness testified against the CEO, Kim was found guilty of abuse by the Korean courts, specifically of forcing girls from his agency to come to his birthday party where he forced them to entertain the executives.