Open Marriages: Hollywood’s Worst Kept Secret?
Denholm and Susan Elliott

You might have seen actor Denholm Elliott in Raiders of the Lost Ark and Indiana Jones and the Last Crusade, but little did people know, Elliott was a self-professed bisexual. After a short marriage and affairs with men, Elliott married actress and writer Susan Robinson, with whom he had an open marriage for 30 years.
“Denholm Elliott never inhibited Susan’s own affairs (‘as long as you don’t fall in love and as long as you don’t have anyone else’s baby’), mainly because… it made him feel less guilty about his own indiscretions,” according to a report by The Telegraph.