Brain Snacks: Tasty Tidbits of Knowledge
Today, "Jekyll and Hyde" is a term used in reference to someone with a split personality. (Source.)
Most productions of Dr. Jekyll and Mr. Hyde significantly alter the original plot, usually inserting a love interest or telling the story from another point of view. Mary Reilly, for instance, stars Julia Roberts as a maid in Dr. Jekyll’s house who falls in love with the doctor, played by John Malkovich. So be careful about "reading" this book by watching its Hollywood counterpart. (Source.)