The "Sons of Anarchy" star will portray Col. Percival Fawcett, a British explorer who disappeared in the 1920s while searching for a mythical city in the Amazon jungles that he believed he discovered on a prior expedition.
Hunnam joins previously announced cast members
The castings and start date come after years of development false starts for "Lost City." The film was initially set up with Gray at former Plan B home
Benedict Cumberbatch had been set to play Fawcett before Hunnam but departed to star in Marvel's "Doctor Strange."
Gray is known for moody, textured dramas such as "We Own the Night" and "Two Lovers." His most recent movie, the Ellis Island melodrama "The Immigrant," was well received when it premiered at the
Hunnam's other upcoming movies include