Planet 51 is a creative idea. Unfortunately, the movie fails in its execution with a formulaic exercise of film making.
The complete discussion, after the jump.
I was very interested when I heard the plot of Planet 51. The film follows a NASA astronaut, Captain Charles "Chuck" Baker (Dwayne Johnson) who lands on Planet 51 thinking he's the first to set foot on it. However, he discovers it's inhabited by little green people who live in a white picket-fenced world reminiscent of 1950s America. This freaks out the aliens, who think he's an alien invader. The film features some well known stars to provide voices including, Dwayne Johnson, Jessica Biel, Justin Long, Seann William Scott, Gary Oldman John Cleese and Ryan Rosenfeld. Each does a good job.