The actor recalled in a Netflix documentary miniseries dedicated to him, called Arnold, the day he confessed to his wife that he had had an affair and an illegitimate child with their housekeeper. "At the time, we were just wondering, 'How do we keep this a secret?'" he is heard saying in the documentary Arnold, which will be available Wednesday, June 7 on Netflix.

The actor evokes a couple therapy session, during which he revealed this secret to his girlfriend at the time.