British actor Fiennes Tiffin has signed with WME, joining the agency's signing spree. Tiffin will be repped at the agency by Elan Ruspoli. Currently, he plays the title role in Guy Ritchie's Prime Video series, Young Sherlock, which premiered at #1 and has been a global hit, reaching 45 million viewers and breaking records with the most-watched trailer debut. His next role is in Lionsgate's sci-fi thriller Above the Below, where he will play alongside Idris Elba and Caitlin Fitzgerald in the upcoming film. Other recent notable signings for WME include Jane Wickline, Sophia Lillis, and JT Mollner.