Planet 51 Jun 2026

Planet 51 is a 2009 animated science fiction comedy that cleverly flips the classic “alien invasion” trope on its head. Instead of Earthlings fearing little green men from Mars, the film imagines a peaceful alien civilization living in a retro-futuristic world reminiscent of 1950s America—where they are terrified of an外来入侵者… from Earth.

With the entire planet panicking over a “deadly extra-terrestrial” on the loose, Chuck must rely on a friendly young alien named Lem (Justin Long) to help him retrieve his spaceship before he’s captured by the paranoid General Grawl (Gary Oldman)—or before the planet’s military dissects him as a specimen. Planet 51

The society is governed by a fear of "alien mind-control," a direct nod to films like Invasion of the Body Snatchers . Characters: Planet 51 is a 2009 animated science fiction

Lost and terrified, Chuck is rescued by a young planetary local named Lem (voiced by Justin Long), a geeky planetarium worker who dreams of adventure but is too scared to live it. Together, they must navigate a society that wants to capture (or dissect) Chuck so he can return to his rover before his oxygen runs out. The society is governed by a fear of

The architecture is Googie-style (the coffee shops with boomerang patterns and starburst signs). The cars are finned rocketships on wheels. The technology is absurdly analog—computers use vacuum tubes and giant tape reels. Even the military uniforms resemble those from Forbidden Planet .

: an American astronaut lands on an alien planet and is treated like a scary invader by a society stuck in a parody of 1950s America. Rotten Tomatoes Critical Consensus The film received "generally unfavorable" reviews from professional critics (39/100 on Metacritic ), while audiences were slightly more forgiving. image for Planet 51