*Update: Robert Rodriguez just confirmed via Twitter that Lady Gaga has joined the cast as “La Chameleon”. He has also debuted a special poster for her character.

Remember the days when films boasted of having “a cast of thousands”? Probably not, but maybe you’ve read about them. In any case, Robert Rodriguez’ now-filming Machete Kills might actually be able to make that claim by the time it’s all wrapped up. Here we have a photo of Alexa Vega – you might remember her from the original Spy Kids movies from when she was a tyke – in character as “KillJoy”. Gaga and Vega join Danny Trejo, Michelle Rodriguez, Mel Gibson, Jessica Alba, Demian Bichir, Amber Heard, Sofia Vergara, Zoe Saldana, William Sadler, Edward James Olmos, Charlie Sheen, Elise Avellan and Electra Avellan.

The sequel finds the titular ex-federale (Trejo) recruited by the U.S. government to stop a terrorist named Mendez the Madman, who happens to be Mexico’s leading cartel dealer. Gibson is set to co-star as Luther Voz, a cunning arms dealer and death merchant who aims to spread war across the planet by launching a nuclear missile. Heard will play a manipulative assassin code-named Miss San Antonio. Pic co-stars Demian Bichir and Charlie Sheen as the U.S. president. The first film was based on Rodriguez’ faux trailer included in Dimension Films’ 2007 Grindhouse.

Head inside the full Lady Gaga “La Chameleon” poster and a look at Alexa Vega as “KillJoy”!