Charlie Hunnam has joined the cast of James Gray’s Lost City Of Z opposite Sienna Miller (American Sniper) and Robert Pattinson (the Twilight films). MICA Entertainment is financing the big-screen adaptation of David Grann’s bestseller. Brad Pitt, Dede Gardner and Jeremy Kleiner are producing via Plan B along with Dale Johnson and Anthony Katagas. Marc Butan is exec producing along with with MICA Entertainment’s Julie B, May and Glenn Murray. Sierra/Affinity is handling international sales at Berlin’s EFM, with CAA handling the domestic sale.  Production is set to begin in the summer.

Hunnam, who wrapped a seven-year run on FX’s Sons Of Anarchy in December, next reteams with his Pacific Rim director Guillermo Del Toro on horror pic Crimson Peak and is set to play the title role in Guy Ritchie’s Knights Of The Roundtable: King Arthur. He also will star opposite Rosamund Pike in The Mountains Between Us. Hunnam is repped by CAA and Brillstein Entertainment.