I don't often sell movies. If I pick up a movie whose premise looks engaging, usually it ends up being good enough to watch again, and I keep it. This one is an exception.I watched it because the premise -- a human finding himself playing the role of alien on another planet -- was intriguing. Unfortunately, the movie spends more time fooling around with slapstick and young love clichés than actually exploring that premise. The humor is silly/ridiculous as opposed to genuinely funny. The story feels shallow, and the emotional heart it could have had barely comes out. I really *wanted* to connect with some of the characters, especially Lem ... how could I not love a science-crazy teenager?! But it turned out to be difficult to care about them. I don't necessarily mind all of the cheeky references to other sci-fi films, but you've got to have more than that to build a movie on.Maybe I was setting my standards a little high by hoping that this would be another E.T., or a kid-friendly version of The Day the Earth Stood Still, with the human and alien roles flipped. But I've seen enough kids' movies that I would honor with an unqualified GREAT assessment that I don't think this one deserves a pass. Treat your kids to something that doesn't insult their taste.

Lem(voiced by Alvin & The Chipmunks Justin Long),is a nerdy alien who's got a crush on an alien girl (voiced by Mrs Justin Timberlake Jessica Biel)who likes Lem as well but she doesn't know that he likes her too. Meanwhile we are introduced to a very charming astronaut named Chuck (voiced by Dwayne The Rock Johnson who I swear can be a bit annoying in this flick at times) enters Lem's world and befriends him while Lem's people thinks that Chuck is an alien,when in actual fact its Lem's people that are aliens,but when this military alien(voiced by Gary Oldman)and a Professor (voiced by Swan Princess and Shrek 2 and 3 star John Cleese) wants to get rid of Chuck, will Chuck ever see his world ever again?The story is kinda bland and the humor isn't that bad,the animation is good and the charcthers are OK.Overall it wasn't a bad film,some of it was funny but don't go expecting a great flick like Tangled or How To Train Your Dragon which are two of my all time favourite CGI movies of all time. Bottom line Planet 51 is an average kids film that centers on aliens (actually this movie reminds me of the 2006 film Monsters Vs Aliens as that contains aliens too and a human befriending the aliens like Susan for example and Chuck who befriended aliens.I'm giving it a 6 out of 10.

The idea was the real reason I wanted to watch this film. Sadly it's the only good thing about this tripe.It's really unfunny. Most of the jokes involve peeing, farting, anal probing and slapstick. And the whole joke of the aliens thinking that the human can turn them into zombies is not funny.It's just an ugly film to look at. I hate the colours and the design. Jessica Biel's character is given nothing to do except be the girlfriend and that's it. There isn't much to her character. Justin Long plays the same sarcastic guy you've seen in every comedy movie he was in. Hey, Gary Oldman is the villain......... again. Poor Gaz. Why did he do this film? He was probably kidnapped like the rest of the actors.John Cleese is just in it for the money and The Rock...... sorry, Dwayne Johnson still can't act.The sci-fi references got on my nerves. How many times do we have to see Star Wars get referenced over and over?Do yourself a favour and rent the kids a Pixar or a Dreamworks film instead.

This fails in the same way that many animated comedies do. Mostly because it sucks ass, bu also because it thinks that referencing other films and popular culture is enough for a comedy. So we have little puppies which are really the alien from Alien. This is cute, but hardly funny. It then references hundreds of sci-fi and 50's nostalgia before playing a Macarena joke. Yes, the world of cinema is still carting out the Macarena when in need of a cheap gag. Perhaps the rights are cheap. Anyway, it's hard to see an interesting idea thrown away like this. It's even harder to hear a voice cast including Gary Oldman going to such waste.