The filmmaker is re-teaming with his Bridge of Spies collaborators - screenwriter Matt Charman and producer Marc Platt - on the as-yet-untitled project.

Based on a pitch from Charman, the movie will centre on "America's most trusted newsman" and his relationship with the Vietnam War, specifically his role in "turning public opinion against the increasingly un-winnable conflict."

Spielberg will produce the movie under his Amblin Entertainment company, but it is unclear whether he will direct the project as well.

Meanwhile, Charman, who earned an Oscar nomination for his Bridge of Spies screenplay, most recently penned the script for Boston Marathon bombing movie Patriots Day. The Mark Wahlberg-led film will hit cinemas this December (16).