British broadcasting legend JONATHAN DIMBLEBY is expecting a child with his publicist girlfriend JESSICA RAY. The political commentator, 62, and Ray, 31, got together in May 2004 shortly after he admitted his 36-year marriage to BEL MOONEY was over. A pal says, "Jonathan and Jessica are thrilled by the news. At this stage they have no thoughts of getting married soon though." Dimbleby already has a daughter, KITTY, who is just three years younger than Ray, while his son DANIEL, a TV producer, is 35.