As of 2015, Jeanne Cooper, who plays Katherine Chancellor, is the cast member to have been on "The Young and the Restless" the longest. She was on the show 40 years, from 1973 until her death in 2013.
At the time of her death, Cooper had been on an American soap opera for the eighth-longest time ever out of all the shows in the genre. She died in May 2013 after becoming ill from an infection. The longest-running male cast member of "The Young and the Restless" is Doug Davidson, who plays private investigator Paul Williams. He has been on the show since 1978 and is still on the show as of 2015, making him the longest-serving current cast member of any gender.