U.S. reality TV personality Chris Harrison announced Thursday he and his wife, Gwen, have separated after 18 years of marriage. Harrison is the host of the dating competition series \"The Bachelor\" and \"The Bachelorette.\" \"Though we have made this incredibly difficult decision to separate, our love and mutual respect remain, and we look forward to sharing in the lives of our wonderful children,\" the former couple said in a joint statement issued to People.com. The couple have two children -- Joshua, 9, and Taylor, 7.