Jayne Ann Krentz, née Jayne Castle (born March 28, 1948 in Cobb, California, USA), is an American writer of romance novels. Krentz is the author of a string of New York Times bestsellers under seven different pseudonyms. Now, she only uses three names. Under her married name she writes contemporary romantic-suspense. She uses Amanda Quick for her novels of historical romantic-suspense. She uses her maiden name for futuristic/paranormal romantic-suspense writing.

Over 35 million copies of Krentz's novels are in print. With Sweet Starfire, she created the futuristic romance subgenre, and further expanded the boundaries of the genre in 1996 with Amaryllis, the first paranormal futuristic romantic suspense novel. She is an outspoken advocate for the romance genre and has been the recipient of the Susan Koppelman Award for Feminist Studies.