<P> Wilma Jeanne Cooper ( October 25 , 1928 -- May 8 , 2013 ) was an American actress , best known for her role as Katherine Chancellor on the CBS soap opera The Young and the Restless ( 1973 -- 2013 ) . At the time of her death , she was eighth on the all - time list of longest - serving soap opera actors in the United States . She was the mother of actor Corbin Bernsen . </P>
<P> Wilma Jeanne Cooper ( October 25 , 1928 -- May 8 , 2013 ) was an American actress , best known for her role as Katherine Chancellor on the CBS soap opera The Young and the Restless ( 1973 -- 2013 ) . At the time of her death , she was eighth on the all - time list of longest - serving soap opera actors in the United States . She was the mother of actor Corbin Bernsen . </P>
who played katherine chancellor on the young and the restless
who played katherine chancellor on the young and the restless
Wilma Jeanne Cooper
Wilma Jeanne Cooper