Wilma Jeanne Cooper (October 25, 1928 – May 8, 2013), known as Jeanne Cooper, was an American actress best known for her portrayal of Katherine Chancellor on the daytime soap opera The Young and the Restless. Although she was not in the series when the show debuted in March 1973, she made her onscreen debut in November of that year, and remained with the series until her death in 2013. She was the mother of Corbin Bernsen.