Three new cast members have joined Sienna Miller (see 'Sienna Miller Signed for G.I. Joe') in the cast of the upcoming G.I. Joe feature, according to Hollywood Reporter. 

Rachel Nichols, who appeared in 17 episodes of Alias and has had a variety of other roles (including one in Charlie Wilson's War, just opening), will play a martial artist heavy on the hand-to-hand combat and counterintelligence. 

Adewale Akinnuoye-Agbaje (Lost, Bourne Identity) will play Heavy Duty, the team's ordnance expert. 

Said Taghmaoui (Kite Runner) is cast as Breaker, who functions as the team's communications specialist.