Washington, Feb 4 : Charlie Hunnam has hopped aboard James Gray's upcoming project ' Lost City Of Z '.

The film, which also stars Sienna Miller and Robert Pattinson, is based on David Grann's 2009 bestseller, and would be financed by MICA Entertainment, Deadline. com reported.

Brad Pitt, Dede Gardner and Jeremy Kleiner are producing through Plan B along with Dale Johnson and Anthony Katagas, while Marc Butan is exec produces along with MICA Entertainment's Julie B, May and Glenn Murray.

The production for film would begin in the summer.

Hunnam, who recently completed 7 year run on FX's 'Sons Of Anarchy' in December, would also be seen playing lead in Guy Ritchie's' Knights Of The Roundtable: King Arthur.' (ANI)