Screen icon Peter Graves of 'Airplane' and the "Mission Impossible" TV series was found dead in his home on Sunday. He was 83.

Law enforcement tells ET that the actor was discovered at his home in Pacific Palisades, having apparently passed away from natural causes. "Peter Graves was found dead at his home in Pacific Palisades this afternoon," the LAPD tells ET. "There will be no coroner or police investigation, his death has been declared a natural death."

"Peter was one of the nicest people on the planet," one-time co-star Martin Landau said. "Working with him for those years on 'Mission Impossible' is among the fondest memories of my life. He was not only extremely talented, but also completely unselfish and always prepared. Peter possessed a great sense of humor, but what impressed me most about him was that I never heard him say a bad word about anyone he encountered. I'd like Joan and the family and to know my deepest love, thoughts and feelings are with them in this hour of bereavement."