Warner Bros. has released its first trailer for Sandra Bullock political dramedy “Our Brand Is Crisis,” an adaptation of the 2005 documentary of the same name.

She portrays political consultant “Calamity” Jane Bodine, who’s saddled with the task of getting an unpopular Bolivian president re-elected. “If you get beaten up, you’re doing your job,” she tells the assembled local supporters.

Billy Bob Thornton portrays her enemy, who has come out on top in their previous encounters. “I thought you retired or something,” he tells Bullock’s character. “What happened to your hair?” she responds.

David Gordon Green directed from a screenplay by Peter Straughan (“Tinker Tailor Soldier Spy”). Anthony Mackie, Scoot McNairy, Zoe Kazan, Ann Dowd, Reynaldo Pacheco, Dominic Flores, Louis Arcella, Octavio Gomez Berrios and Joaquim de Almeida also star.

Smokehouse Pictures principals George Clooney and Grant Heslov produced, with Bullock, Participant Media’s Jeff Skoll and Jonathan King and Stuart Besser serving as executive producers.

“Our Brand Is Crisis” will open Oct. 30 against Paramount’s “Scouts Guide to the Zombie Apocalypse.”