Here’s the latest I can share based on recent reporting.
David Harbour has been reported to join the John Rambo prequel as Major Trautman, with Noah Centineo cast as the younger John Rambo. The casting was widely covered in mid-April 2026 by multiple outlets, and Variety is among the notable confirmations shaping the story so far. [cite ][cite ]
The project, directed by Jaume Collet-Serra (as sources indicate), is described as a Rambo origin story set before the events of the first film. Reports place Harbour’s Trautman as a mentor figure within the prequel’s timeline. [cite ][cite ]
Several outlets note that filming for the film wrapped in Thailand around March 2026, with Harbour’s casting appearing after principal photography had concluded. Details vary slightly by outlet, but the core claim is Harbour joining the cast as Trautman in the John Rambo prequel. [cite ][cite ]
If you’re looking for a quick snapshot: Harbour plays Major Trautman, the senior officer connected to Rambo, in the prequel titled John Rambo, while Centineo portrays a younger Rambo. The project is part of a push to expand the Rambo universe with a prequel timeline. [cite ][cite ]
Would you like a concise timeline of announcements from major outlets with direct quotes, or a focused recap of who’s attached (cast/crew) and what each source says? I can also pull together a short list of coverage in the order they emerged.[4][6][8]
David Harbour has joined the cast of John Rambo. According to Variety, the 51-year-old actor – star of Netflix’s Stranger Things – is set to star as Rambo’s commanding officer Major Trautman in the upcoming prequel to Sylvester Stallone’s 1982 movie First Blood.
www.yardbarker.com'Stranger Things' star David Harbour has joined the cast of the 'John Rambo' origin story, starring alongside Noah Centineo. Harbour will portray Major Trautman, Rambo's commanding officer, in the Jalmari Helander-directed prequel.
newsable.asianetnews.comDavid Harbour is set to play another major character from the franchise's history.
www.radiotimes.com'Stranger Things' star David Harbour joins Noah Centineo in the 'John Rambo' prequel, playing Major Trautman in the origin story directed by Jalmari Helander.
www.newkerala.comSet before the events of the original 1982 film "First Blood", the film, titled "John Rambo", is being developed as a prequel with Noah Centineo playing the younger version of the iconic character
www.theweek.inDavid Harbour has been cast in the Rambo prequel film now in production at Lionsgate. He will be playing Major Trautman.
bleedingcool.com