Justin Long joins 'The Conspirator'

James McAvoy, Robin Wright Penn also in Redford drama

Justin Long is joining James McAvoy and Robin Wright Penn in "The Conspirator," the historical drama that Robert Redford is directing.

"Conspirator" tells the story of Confederate sympathizer Mary Surratt (Wright Penn), who was tried as a conspirator in the Lincoln assassination, and Col. Frederick Aiken (McAvoy), who reluctantly agreed to defend her before a military tribunal.

Long plays a soldier who lost a limb in the Civil War and is McAvoy's best friend and conscience.

Redford is producing with Greg Shapiro, Wildwood Enterprises' Bill Holderman and American Film Co.'s Robert Stone, Webster Stone and Brian Falk.

The movie shoots in Georgia this month.

The period drama is a first for Long, who is known for his comedic sensibilities or horror appearances, and offers him a chance to show some versatility.

Repped by UTA and Principato-Young, Long recently wrapped romantic comedy "Going the Distance" opposite Drew Barrymore. He will next be seen opposite Liam Neeson in the supernatural thriller "After.Life" and with Michael Cera in Miguel Arteta's coming-of-age comedy "Youth in Revolt."