David Harbour has joined “John Rambo” as Major Trautman, handing Lionsgate’s prequel a key piece of franchise DNA as the film pushes through production in Thailand. The casting places Harbour opposite Noah Centineo, who is playing a younger John Rambo in director Jalmari Helander’s Vietnam-set origin story, a project that has steadily gathered weight since Lionsgate picked up rights and Sylvester Stallone came aboard as an executive producer in March.
Trautman carries unusual importance in this series. Richard Crenna played the officer across the first three films, shaping him into the military figure who understands Rambo best and often speaks for the institution that created him.
Bringing Harbour into that role signals that the prequel is leaning hard on a familiar emotional anchor while rebuilding the brand around a younger lead. Trade reports say the film began principal photography in Bangkok in late January, with Yao, Jason Tobin, Quincy Isaiah, Jefferson White and Tayme Thapthimthong joining the cast.
Helander has framed the film as an attempt to show Rambo before war stripped him down. In an interview late last year, the director said this version starts from a place where the character is “happy and younger,” with the story tracing the damage that turns him into the haunted veteran seen in “First Blood.”
That approach marks a clear shift from the older films, which introduced Rambo after Vietnam had already scarred him. It also gives Trautman fresh dramatic value, since the character stands close to the machinery that trained Rambo and, in the franchise’s mythology, helped shape the soldier he became.
The business case is plain enough. The Rambo films remain a recognizable action property, with the five released features generating more than $338 million at the domestic box office alone, and Lionsgate has spent the last year locking down future rights and production partners.
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AGBO joined the film in late 2025, followed by Stallone’s executive-producer move, steps that gave the prequel stronger commercial backing after early skepticism from fans who questioned a younger Rambo without Stallone onscreen. Harbour’s casting does not settle that debate, though it does give the movie a performer with enough heft to steady a role longtime viewers know well.
