Answer
Four "Spy Kids" films feature Alexa Vega. The first film, released in 2001, introduced the Cortez family and their adventures as secret agents. The success of the first film led to three sequels: "Spy Kids 2: The Island of Lost Dreams" (2002), "Spy Kids 3-D: Game Over" (2003), and "Spy Kids: All the Time in the World" (2011).