The 76-year-old "The Terror" actress shared the side of Nicholson that was only known to her, reported Contactmusic.
Calling the "Chinatown" actor loving and caring his first and only wife, Knight said, "The real Jack is a loving, caring and giving person."
Knight, who has a daughter, Jennifer with the 79-year-old veteran star, emphasised the actor is more than what he is known for his caddish reputation and cleared that both had a beautiful and sweet marriage.