LONDON: The producers of the hit TV show The Simpsons are still trying to get Oscar winning actress Nicole Kidman to make a guest appearance on the show. According to contactmusic.com, Kidman has failed to respond to invitations. The executive producer of the show, Al Jean, says, “We approached Nicole when we were looking for a celebrity couple when she was married to Tom Cruise. Some way, sooner or later, we should be able to get her, though.” Cruise and Nicole have since gone their separate ways after more than 10 years of marriage.