The buzz around Guy Ritchie’s Young Sherlock is already historic, and the series hasn’t even aired yet. The first trailer for the upcoming Prime Video series dropped on February 5, and within seven days, it racked up a staggering 223 million views worldwide. That number officially makes it the most-watched series trailer in Prime Video history, beating out some of the biggest shows on the platform .
For context, the previous record holder was the first trailer for The Lord of the Rings: The Rings of Power Season 1, which earned 163.6 million views in its first week. The Season 2 trailer for The Summer I Turned Pretty followed with 151.8 million views. Young Sherlock didn’t just beat them—it sailed past them with a massive lead . The data comes from Wavemetrix, a firm that tracks viewership metrics, and it signals that audiences are more than ready for a fresh take on the world’s most famous detective .
What the Young Sherlock Trailer Reveals About the Series
The trailer gives viewers a loud, fast, and stylish look at what Guy Ritchie is bringing to the table. This is not the calm, pipe-smoking, deerstalker-wearing detective from old black-and-white films. Instead, the preview shows Hero Fiennes Tiffin as a 19-year-old Sherlock Holmes who is impulsive, scrappy, and not afraid to throw a punch .
Set in the 1870s, the series finds Sherlock as a student at Oxford University. He is described as a disgraced and rebellious young man who gets framed for murder. The trailer teases a high-stakes chase, with Sherlock going from the foggy streets of Victorian London to locations abroad, all while trying to clear his name and uncover a global conspiracy .
The action looks intense, and the style is pure Ritchie—quick cuts, gritty atmosphere, and a sense of chaotic energy. The official synopsis from Prime Video explains that this first case will introduce Sherlock to James Moriarty, setting the stage for their famous rivalry. The case, and the people he meets, will change the course of his life forever .
The Star-Studded Cast of Young Sherlock
Leading the charge is Hero Fiennes Tiffin, best known for the After film series. He steps into the shoes of a young Sherlock who is still figuring out who he is. He is backed by a cast that mixes rising stars with established Hollywood names .
The full cast lineup includes:
- Dónal Finn (The Wheel of Time) as James Moriarty
- Zine Tseng (3 Body Problem) as Princess Gulun Shou’an, a mysterious Chinese royal connected to Oxford
- Joseph Fiennes (The Handmaid‘s Tale) as Silas Holmes, Sherlock’s father
- Natascha McElhone (Halo) as Cordelia Holmes, Sherlock’s mother
- Max Irons (Condor) as Mycroft Holmes, Sherlock’s brother
- Colin Firth (The King’s Speech) as Sir Bucephalus Hodge
Having an Oscar winner like Colin Firth in the supporting cast adds serious weight to the project, and Zine Tseng’s role as a princess suggests the conspiracy will have international stakes .
Guy Ritchie Returns to Sherlock Holmes
This series marks a return to the world of Sherlock Holmes for Guy Ritchie. He previously directed Robert Downey Jr. in the two Sherlock Holmes movies—Sherlock Holmes (2009) and Sherlock Holmes: A Game of Shadows (2011). Those films were massive hits, known for their witty banter, slow-motion fight sequences, and industrial-age action .
For Young Sherlock, Ritchie directs the first two episodes and serves as an executive producer. While this new series is not connected to the Downey Jr. films, fans of those movies will likely recognize the same gritty, fast-paced energy in the trailer. Matthew Parkhill serves as the showrunner and creator for the series, which is based on the Young Sherlock Holmes book series by Andrew Lane .
Why the Trailer Views Matter
The 223 million view count is a clear signal that audiences are hungry for more content featuring Sherlock Holmes. The character has been portrayed by everyone from Benedict Cumberbatch in the BBC’s Sherlock to Henry Cavill in the Enola Holmes movies, and interest remains high .
This record also shows the power of the Prime Video platform. Beating a giant like The Rings of Power is no small feat. It suggests that the marketing campaign is working and that the combination of Guy Ritchie‘s name, a beloved character, and a young, attractive lead in Hero Fiennes Tiffin is a winning formula for drawing eyeballs .
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When and Where to Watch Young Sherlock
All eight episodes of Young Sherlock will premiere exclusively on Prime Video on March 4, 2026. The release will be global, available in more than 240 countries and territories, including the United States, the United Kingdom, Canada, Australia, and India. Viewers worldwide will be able to stream the entire first season on that date .
The series is produced by Motive Pictures, and the executive producer team includes Dhana Rivera Gilbert, Marc Resteghini, Simon Maxwell, Ivan Atkinson, Simon Kelton, and Colin Wilson, with Harriet Creelman and Steve Thompson serving as co-executive producers .
With the trailer already breaking records, the anticipation for March 4 is only going to grow. If the series delivers on the promise of that 223 million-view preview, Guy Ritchie might just have another hit franchise on his hands.
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