Colin Firth is the latest name to jump on board the cast of Guy Ritchie’s Young Sherlock’ series for Amazon.

Firth joins Hero Fiennes Tiffin who is set to play the lead in the eight-episode series. Also on the cast are Joseph Fiennes, Natascha McElhone, and Zine Tseng. Firth is set to play the character of Sir Bucephalus Hodge, those character details are currently under wraps.

The series is officially described as an “action-packed origin story of Sir Arthur Conan Doyle’s beloved detective in an explosive re-imagining 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 globe-trotting conspiracy that will change his life forever.”

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“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,” said Ritchie. “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.”

Matthew Parkhill will pen the series as well as showrun, and executive producer on the series. Along with Ritchie and Lane, Simon Kelton of Inspirational Entertainment also executive produces, as does Ivan Atkinson, Simon Maxwell of Motive Pictures, Dhana Gilbert, Colin Wilson, and former Amazon head of series development Marc Resteghini. Harriet Creelman will co-executive produce for Motive Pictures.