Eva Green, Keri Russell, Diane Kruger, and Jennifer Garner. About her stunt work in which she rehearsed with stunt coordinator Gary Powell (Casino Royale, The Bourne Ultimatum, Quantum of Solace), gymnastic acrobats from Cirque du Soleil and used aerial stunt rigs created for The Matrix, Lively explained, "Our director likes it real—the fights close and dirty... I'm 40 feet in the air, spiraling around. That's the best workout you can ever do because it's all core... You do that for ten minutes and you should see your body the next day! It's so exhilarating, so thrilling—and nauseating". Jenna Craig portrays a young Ferris. Peter Sarsgaard as Hector Hammond: A scientist who is exposed to the yellow energy of fear from Parallax, which causes his brain to grow to an enormous size and grants him psionic powers. Regarding his preparation for the role, Sarsgaard stated, "I actually did hang with this biologist from Tulane that was I think just the most eccentric guy they could find. He was entertaining, and he and I actually worked on my lecture that I give in [Green Lantern]." About his character Sarsgaard remarked, "He's got shades of gray. It's eccentricity on top of eccentricity". Kennon Kepper portrays a young Hammond. Mark Strong as Thaal Sinestro: A Green Lantern and Hal Jordan's mentor. Strong affirmed that the film will follow the origin story, "the film closely follows the early comics. Sinestro starts out as Hal Jordan's mentor, slightly suspicious and not sure of him because obviously Hal is the first human being who's made into a Green Lantern. He's certainly very strict and unsure of the wisdom of Hal becoming a Green Lantern". Strong said, the character "is a military guy but isn't immediately bad. It's the kind of person that lends himself to becoming bad over the course of the comics being written, but initially he's quite a heroic figure." He also revealed that the outfit and other aspects of the character very closely follow the character's early days, "That widow's peak and thin mustache was for some reason originally based on David Niven... So I would like to do justice to the Sinestro that was conceived for the comic books". Angela Bassett as Amanda Waller: A former congressional aide and government agent. About the differences between the comic book and film character Bassett said, "Well, I'm not 300 pounds," but added that her character