Johnny Carson's sidekick, Ed McMahon, has filed for divorce from Victoria V. McMahon, his wife of 13 years.
McMahon cited "irreconcilable differences" in his divorce filing Tuesday.His executive assistant, Madeline Kelly, said he is seeking custody of the couple's 3 1/2-year-old adopted daughter, Katherine.
McMahon, 66, and Victoria, 44, separated July 15. He has four grown children by a previous marriage.