Mark Ciardi is producing the project, with its script just named to the 2015 Black List. Apex's Campbell McInnes and Chris Cowles of DMG Entertainment are also producing, said the Hollywood Reporter.
"I've done a lot of true life stories, many sports stories, but this one had a deep impact on this country," said Ciardi.
"Everyone has an idea of what happened on Chappaquiddick, and this strings together the events in a compelling and emotional way. You'll see what (Senator Ted Kennedy) had to go through."