Casey Affleck Joins HBO’s Lewis and Clark Miniseries

WASHINGTON, DC - MAY 02: Actor Casey Affleck attends the White House Correspondents' Dinner Weekend Pre-Party hosted by The New Yorker's David Remnick at the W Hotel Washington DC on May 2, 2014 in Washington, DC. (Photo by Dimitrios Kambouris/Getty Images for The New Yorker) Photo: Dimitrios Kambouris/2014 Getty Images

He'll be Meriwether Lewis in the six-hour HBO miniseries, which is finally happening after years in development. Ed Norton, Tom Hanks, and Brad Pitt are all on board as producers; his partner has not been cast, but the real Clark was four years older than Lewis, so Ben Affleck is not, like, a preposterous suggestion.