Yeo Woon-kay (Korean: 여운계; February 25, 1940 – May 22, 2009) was a South Korean actress and television personality. She was best known for Korean films such as War of Money, Bad Family and My Lovely Sam Soon.^[1]

Yeo began acting while in high school. She continued to act while attending Korea University, where she studied literature.^[2] She became known for her work in Daehakgeuk, which is also called the amateur student theater, during the 1950s and 1960s, alongside other contemporary Korean actors like Lee Soon-jae.^[2][3]

She made her professional theater debut with a theater troupe in 1962.^[2] From theater, she was able to transition to a successful television career.^[2] She often played the role of a grandmother or "grandmotherly figure".^[2] Examples of these characters included her roles in Toji in 1986 and Jewel in the Palace in 2003.^[2]

Ms. Yeo was diagnosed with kidney cancer in 2007 while shooting the SBS TV series The King and I.^[2] But she continued to act and began work on the KBS2 production of Love and Obsession,^[2] eventually quitting the production due to pneumonia, indicating the spread of cancer to her lungs.^[2]

Yeo entered the hospital intensive care unit in May 2009.^[2] Reports say that she fell into a coma and was placed on life support.^[2] She died around 8 P.M. on May 22, 2009, at the Incheon Catholic Medical Center in Incheon, South Korea, at the age of 69. Her funeral was held at the Severance Hospital.^[2][4]

Yeo was awarded the Life Achievement Award posthumously at the KBS Drama Awards in 2009.