She played the big sister, Carmen Cortez, in the Spy Kids movies. Her other films include The Devil's Carnival, The Clockwork Girl, and Machete Kills.
She was a competitive Gymnast. She debuted as Priscilla in the 1994 film Little Giants.
She played Ruby on the ABC Family sitcom Ruby & The Rockits.
She was born Alexa Ellesse Vega. She married Sean Covel in October 2010, and the couple divorced in July 2012. She then married Carlos Pena in January of 2014. The couple changed their last name to PenaVega, a combination of both of their Surnames. In December 2016, she and Carlos welcomed their first child, a son named Ocean.
She was in the disaster film Twister with Helen Hunt.