Lewis and Clark: HBO Greenlights Miniseries Starring Casey Affleck

Casey Affleck Lewis and Clark HBO

HBO’s making history again.

The premium cabler, home of John Adams and The Pacific, soon will set off on a new expedition: a miniseries based on the historical travels of Lewis and Clark.

Casey Affleck (Gone Baby Gone) will play Meriwether Lewis opposite Belgian actor Matthias Schoenaerts as William Clark in a project chronicling the famous trip, the network announced Friday.

The six-hour miniseries, based on Stephen E. Ambrose’s Undaunted Courage, will follow the 19th-century explorers as they go on a President Jefferson-ordered excursion through uncharted territory, searching for an all-water route to the Pacific Ocean.

The miniseries’ executive producers include Tom Hanks (Forrest Gump), Gary Goetzman (Game Change), Edward Norton (Fight Club), Brad Pitt (Inglourious Basterds) and Dede Gardner (The Normal Heart).

Masters of Sex showrunner Michelle Ashford, John Curran (The Painted Veil) and Norton will pen the script, with Curran directing.

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