Abigail Breslin has joined the cast of Ender's Game, along with Harrison Ford.
The Indiana Jones star was in talks to play Colonel Hyrum Graff, the commander of training for the International Fleet, an elite boys' military academy in the sci-fi adventure, and has now officialy signed up.
Little Miss Sunshine's Abigail will play the older sister of the hero, Ender, a bullied young boy who turns out to be a master military strategist in an alien attack, Variety reported.
Hugo's Asa Butterfield will star as Andrew 'Ender' Wiggin in Gavin Hood's big-screen adaptation of Orson Scott Card's best-selling novel about a boy who develops military strategies through war games in an attempt to prepare for an intergalactic battle against "insect-like" aliens.
True Grit star Hailee Steinfield will play Petra Arkanian, Ender's trusted right hand.
Sir Ben Kingsley is reportedly in talks to play "a legendary war hero presumed to be long dead" in the sci-fi thriller.
Production is gearing up to shoot in February for a March 2013 release.