Planet 51: the Better Wall-e and the Dog with the Alien Head

Planet 51 is about little green aliens living peacefully on a planet much like Earth and much like humans thinking they are the only intelligent life in the universe. It comes from the makers of Shrek. I guess they had lots of green leftovers from Shrek and had to do something with them.
A central character is a small white robot looking very much like Wall-e. Only it is better and much cuter. See below. Wall-e is like the ugly cousin of the planet 51 robot. See for yourself:




And there's also the cutest alien dog with a head that looks like the head of the Alien.





Planet 51 is sharp, witty, freshly funny, and very much worth seeing.