Young Sherlock Cast: Meet the Stars of Prime Video’s 2026 Series Adaptation

Hero Fiennes Tiffin leads the cast of Young Sherlock, a new Prime Video series that takes a fresh look at the iconic detective at 19 years old. Sherlock is portrayed as a janitor at Oxford, eager to solve mysteries and follow leads, but not quite a fully-fledged detective yet. The show aims to explore his early adventures and the development of his detective skills.

Dónal Finn steps into the role of James Moriarty, Sherlock’s infamous enemy, in this adaptation where they start out as friends. The dynamic between the two characters is a key focus of the series, showcasing the unique bond and camaraderie they share. Irish actor Finn brings a new perspective to the character, adding depth and complexity to the iconic villain.

Zine Tseng plays Princess Gulun Shou’an, a kung fu master with a mysterious past and a deadly secret. Tseng brings a sense of intrigue and danger to the character, showcasing her skills and intelligence in every scene. Princess Gulun adds an exciting new dimension to the world of Young Sherlock, keeping viewers on the edge of their seats with every twist and turn.

Max Irons takes on the role of Mycroft Holmes, Sherlock’s elder brother, who serves as a steady presence in his life. Irons brings a sense of loyalty and protection to the character, showcasing the brotherly bond between Mycroft and Sherlock. As a seasoned actor with a wealth of experience, Irons adds depth and nuance to the relationship between the two siblings.

Holly Cattle portrays Edie, a charismatic and intelligent character known for her charm and manipulative nature. Cattle brings a fierce and powerful energy to the role, creating a character that is both alluring and dangerous. Edie’s transformation throughout the series promises to be a highlight, keeping viewers guessing and intrigued by her motives.

Natascha McElhone rounds out the cast as Cordelia Holmes, Sherlock’s devoted mother and matriarch of the Holmes clan. McElhone’s portrayal adds a new dimension to Sherlock’s family dynamic, showcasing a side of the detective not often explored in previous adaptations. With her experience and talent, McElhone brings warmth and depth to the character, revealing the intricate relationships within the Holmes family.

Young Sherlock promises to be an exciting and fresh take on the beloved detective, exploring new aspects of the character’s early life and adventures. With a talented cast and creative team behind the series, viewers can expect a thrilling and immersive experience that stays true to the essence of Sherlock Holmes while offering a unique and dynamic perspective on the iconic character.