The "Harry Potter" series is one of the most popular franchises of all time, but even the biggest fans may not know everything about Tom Riddle, also known as Lord Voldemort, the Dark Lord, and He Who Must Not Be Named.
Prior to using her platform to spread transphobic messages, the series' controversial author J.K. Rowling was known to use Twitter, interviews, and the official Wizarding World website to expand the "Harry Potter" canon by sharing new information about characters and plotlines beyond the seven books.
With all of that content, even the most dedicated of fans may have missed a few details.
Here are 18 little-known facts about Voldemort that even die-hard "Harry Potter" fans may have missed.