Planet 51 (2009)

Synopsis:
Little green aliens live in a society reminiscent of 1950s America in the town of Glipforg on Planet 51. Lem (Justin Long) is a teenage alien who has just gotten a job at the local planetarium museum. His best friend Skiff (Seann William Scott), a geeky alien teen, is a huge fan of the Humaniacs films.

When Lem gets home, he asks his next door neighbor and friend, Eckle (Freddie Benedict) about his older sister Neera (Jessica Biel), who is Lem's long-time crush. Lem's family is holding a barbecue with the neighbors. Neera is at the barbecue, but when Lem attempts to ask her out, he keeps being interrupted by Neera's hippie friend, Glar.

Meanwhile, a mysterious spacecraft pulls into orbit around Planet 51, sending out a blinking red signal. Down on the planet, under a hidden army base called "Base 9" (the aliens' version of Area 51), there is a basement filled with artifacts from Earth including the missing robotic satellites launched from America and the Soviet Union. One artifact "wakes up" from the signal; it is a wheeled probe with artificial intelligence, named "Rover." Rover breaks out of the basement and escapes to perform its primary mission: to find the astronaut. Its secondary mission is to collect rocks. The army becomes suspicious of Rover's escape and begins to look into its activity.
Watch