High Quality Content by WIKIPEDIA articles! Diane Jenkins (formerly Richards and Newman) is a fictional character on the CBS Daytime soap opera The Young and the Restless. Originated by actress Alex Donnelley, she was last portrayed by Maura West from October 8, 2010 to August 5, 2011. For a short period of time after the character`s death, West continued to appear as Diane in flashbacks. Much of Diane`s history has revolved around her romance with Jack Abbott, marriages to Victor Newman and rivalries with Patty Williams, Nikki Newman and Phyllis Newman.