if you havent seen The Misfits, Huston was in the throes of alcoholism and gambling addiction..It was so bad he had Monroe put into rehab to get an insurance payout... Marilyn Monroe was a drug addict and this was her last film...Montgomery Clift was a drug addict,..and all of it took a toll on Clark Gable who died shortly after filming ended.
I think Elvis did not want to marry Priscilla and was forced into it.
But I am also pretty positive a marriage to Ann Margaret wouldn’t have gone any better.