Writer/director Robert Rodriguez has took to his Twitter account to reveal a surprise late addition to the ‘Machete Kills’ cast in Lady Gaga, who’s playing a character named La Chameleón. Accompanying the news is the above character poster for her role in the film. Rodriguez tweeted, “I just finished working with @LadyGaga on @MacheteKills, she kicked SO MUCH ASS! Holy Smokes. Blown away!” In related news, Alexa Vega, probably best known for starring as Carmen Cortez in Rodriguez’s original ‘Spy Kids’ trilogy, unveiled the first look at her character KillJoy through her Instagram account.

In ‘Machete Kills,’ Danny Trejo returns as the titular Machete, joined by Michelle Rodriguez and Jessica Alba reprising their roles from the first film. The story finds Machete “recruited by the U.S. government to take down a cartel leader and stop an arms dealer from launching a deadly missile.”  Mel Gibson is onboard as the villainous arms dealer, while Demian Bichir, Alexa Vega, Charlie Sheen, Sofia Vergara, Edward James Olmos, and Amber Heard round out the newcomers. The sequel will reportedly feature a Grindhouse-style trailer for a third entry in the ‘Machete’ franchise, ‘Machete Kills Again… In Space!’ Look out for ‘Machete Kills’ sometime in 2013.