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OTRC: Alexa Vega shows off curves from 'Machete Kills' set - See photo

Alexa Vega appears in a still from the 2002 film, 'Spy Kids 2: Island of Lost Dreams.' / Alexa Vega appears in a photo posted on her official Instagram account in June 2012. (Dimension Films / instagram.com/p/MXZllDyOZf/)

Alexa Vega, best known for her role in the "Spy Kids" franchise proved she is all grown up, posting a sexy photo on Instagram from the set of her next movie.

"RR gave the OK for a sneak peek," the 23-year-old actress wrote on her official Instagram account, referring to director Robert Rodriguez who cast the actress in his upcoming thriller, "Machete Kills." In the movie, Vega portrays a character named Killjoy, who is an assassin who works for Sofia Vergara's character, Madame Desdemona.

The sequel follows Machete (Danny Trejo) after he is hired by the U.S. government to take down an arms dealer in Mexico who plots to launch a weapon into space.

"Machete Kills" also stars Lady Gaga, Amber Heard, Mel Gibson, Jessica Alba, Vanessa Hudgens, Michelle Rodriguez and Cuba Gooding Jr.

Rodriguez directed Vega in all four "Spy Kids" films, the first of which debuted in 2001. The director also walked Vega down the aisle in her 2010 wedding to film producer Sean Covel, 36.

Vega recently filed for a divorce from Covel, citing irreconcilable differences, and wrote on Twitter, "My relationship with Sean was deeply important and formative for both of us. It simply evolved out of a marriage and into a friendship."

Since "Spy Kids," Vega has starred in two episodes of ABC series "The Middle" and the movie From "Prada to Nada" with Wilmer Valderrama. She has also appeared in films like "Rep! The Genetic Opera" and "The Devil's Carnival."

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