Sorkin's (The Social Network, The West Wing) 10-part series will look at the workings and behind-the-scenes drama of fictional cable news show News Night.
Sky Atlantic will air the newsroom-based series, which stars Jeff Daniels as broadcaster and News Night anchor Will McAvoy, on Tuesdays nights at 10pm.
The drama also stars Emily Mortimer, Alison Pill, Dev Patel, Olivia Munn, John Gallagher, Jr, Thomas Sadoski and Sam Waterston.
Jane Fonda joins the series in later episodes as the CEO of the cable show's parent company.
The Newsroom premieres on HBO in the US on June 24.