Young Voldemort is about to become the world’s greatest detective. Hero Fiennes Tiffin has been cast as the titular detective in Amazon Prime Video’s Young Sherlock Holmes series based on the novels by Andy Lane.

Tiffin had his first big role in Harry Potter and the Half-Blood Prince as the boy Tom Riddle who would grow up to become Lord Voldemort. He is also known for the After franchise, The Silencing, First Love, The Woman King, and The Loneliest Boy in the World.

Guy Ritchie is directing and executive producing the series, which is scheduled for an eight-episode run. This is Ritchie’s third outing with the detective from 221B Baker Street – he directed the Sherlock Holmes movies that starred Robert Downey Jr. as Sherlock, Jude Law as Dr. Watson, and Rachel McAdams as Irene Adler.

“In Young Sherlock we’re going to see an exhilarating new version of the detective everyone thinks they know in a way they’ve never imagined before,” Ritchie said. “We’re going to crack open this enigmatic character, find out what makes him tick, and learn how he becomes the genius we all love.”

It’s the second project that Ritchie and Tiffin partnered on, following The Ministry of Ungentlemanly Warfare. Matthew Parkhill (Deep State) is the showrunner, writer, and executive producer on the series, and Lane is also executive producing.

Amazon described the series as “an action-packed origin story of Sir Arthur Conan Doyle’s beloved detective in an explosive reimagining of this iconic character. At age 19, Sherlock Holmes is disgraced, raw, unfiltered, and unformed, when he finds himself caught up in a murder mystery at Oxford University which threatens his freedom. Diving into his first ever case with a wild lack of discipline, Sherlock manages to unravel a globetrotting conspiracy that will change his life forever.”