One of the most anticipated Tamil films of 2026, OM: Chapter 1 – Udhiram: The Blood Wood, starring Dhanush and Mammootty, is generating considerable excitement among movie lovers. Directed by Amaran filmmaker Rajkumar Periasamy, the upcoming film promises an intense emotional drama set in a gritty world where crime, power, poverty and violence shape people's lives.
The film has also attracted attention because of its impressive ensemble cast, intriguing promotional material and reported runtime of more than three hours. So, what is the story of OM, who plays which character, and how long will audiences have to spend inside its cinematic world? Here's everything you need to know.
OM Movie Runtime: Is It Really Three Hours Long?
Yes! The film is listed with a runtime of 186 minutes (3 hours and 6 minutes) by international cinema exhibitors. Another cinema listing gives its duration as 2 hours and 58 minutes, so the final certified theatrical runtime should be checked against the official Indian release information.
This makes OM a relatively lengthy theatrical experience, suggesting that the film has considerable room for its characters, emotional conflicts and crime-drama narrative to develop.
OM Movie Synopsis: What Is the Story About?
According to the synopsis published by cinema exhibitors, OM is an emotional drama set in a gritty society where lawbreakers and law-enforcers exist in close proximity.
The film explores how greed, power and poverty can unleash cruelty, criminality, violence and bloodshed. Rather than presenting a straightforward action story, the premise suggests a layered narrative involving human relationships, social realities and moral conflicts.
The film's promotional material also hints at a world of dense forests, temple towns, armed confrontations and rebellion. The story is expected to bring together intense action and emotional storytelling.
The makers have not revealed the complete plot, keeping the central conflicts and major twists under wraps.
Star Cast and Character Details
The film brings together leading performers from Tamil and Malayalam cinema.
Dhanush
Plays the central character, a woodcutter caught up in the red sandalwood trade. His character's name has not been fully disclosed.
Mammootty
Plays Burma Karthikeyan, also known as Siya, a smuggler with complex moral shades.
Plays Nithya Reddy, a CBI officer investigating red sandalwood smuggling.
Plays Roja, an important character in the film.
Other important cast members include Naseeruddin Shah, Indrans and Chaitu Jonnalagadda.
Director Rajkumar Periasamy's Vision
After the success of Amaran, director Rajkumar Periasamy is returning with a very different cinematic world.
The filmmaker has described OM as an emotional drama rooted in the true-crime genre. He has explained that the different characters are interconnected and brought together for a common cause.
Interestingly, despite the title carrying the words Chapter 1, the director has clarified that the film will deliver a complete story rather than leave the central narrative unfinished for a sequel.
OM Movie Release Date and Technical Details
Detail | Information |
|---|---|
Movie | OM: Chapter 1 – Udhiram: The Blood Wood |
Director | Rajkumar Periasamy |
Lead actors | Dhanush, Mammootty |
Female leads | Sai Pallavi, Sreeleela |
Other cast | Naseeruddin Shah, Indrans |
Music | Sai Abhyankkar |
Genre | Action, Crime, Drama |
Runtime | 186 minutes (listed) |
Release date | 20 November 2026 |
Languages | Tamil, Telugu, Hindi |
Why OM Is One of the Most Anticipated Films of 2026
There are several reasons why audiences are looking forward to this film:
Dhanush and Mammootty together: The combination of two acclaimed performers is a major attraction.
Sai Pallavi's powerful role: Her portrayal of an investigating officer adds another dimension to the story.
A realistic crime-drama setting: The themes of red sandalwood smuggling, poverty and power offer scope for an intense narrative.
Rajkumar Periasamy's direction: Expectations are high following the response to Amaran.
A lengthy cinematic experience: A runtime close to three hours suggests an expansive story.
Conclusion
OM: Chapter 1 – Udhiram: The Blood Wood appears to be more than a conventional action thriller. With Dhanush, Mammootty and Sai Pallavi leading an emotionally layered crime drama, the film promises a combination of suspense, action and powerful performances.
With a listed runtime of 186 minutes and a theatrical release scheduled for November 20, 2026, OM is among the major upcoming South Indian releases to watch out for.
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