Alexa Ellesse PenaVega (née Vega; born August 27, 1988) is an American actress. She is known for her roles as Carmen Cortez in the first four Spy Kids films and Julie Corky in the 2004 film Sleepover. In 2009, she starred as the title character Ruby Gallagher in the ABC Family series Ruby & the Rockits. She has also been featured in a number of Hallmark Channel films.