What a freaking movie. So many twists and turns. Absolutely intense from start to finish.

I am only giving this movie a 1 for the great cast, though I can't imagine what any of them were thinking. This movie was horrible

Actress is magnificent and exudes a hypnotic screen presence in this affecting drama.

Blistering performances.

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.

Alien invasion films have been around for years, seeing humans terrified by the Martian or elsewhere unknown beings and we don't know whether they are good or bad, and it was interesting to see a cartoon film taking the premise and reversing it, so humans are the invaders on an alien planet. Basically on Planet 51, a world populated by green aliens, in the town Glipforg set an era similar to the 1950's culture, average teenager Lem (Justin Long) has a job as the planetarium and has had a crush on Neera (Jessica Biel) for a long time, but he keeps getting interrupted by her hippie friend Glar (Alan Marriott) before he can speak his feelings, and he assumes Glar is her boyfriend. The world is about to change dramatically by the arrival of human astronaut Captain Charles 'Chuck' T. Baker (Dwayne 'The Rock' Johnson) who has travelled a very long way from Earth to claim the planet he has found in the name of the United States, obviously spotted by the inhabitants he is the alien, not them. Thankfully Lem, eventually, is willing to let the human stay in his house and away from the media spotlight that will brand him a monster and a danger to the planet, all Chuck wants is to place his flag in the planet's soil, gather some evidence of his visit, and return to Earth as a hero with many screaming fans. Keeping out of sight from the rest of the alien race is not easy though, and when he is found out he is indeed made out to be a threat, especially General Grawl (Gary Oldman) who is happy to put him in the hands of mad Professor Kipple (John Cleese) and see him be exterminated. In the end, the human proves himself a good visitor to Planet 51 after saving the life of the General, he is allowed to go back to Earth and achieve his ambition, his faithful wheeled artificially intelligent probe Rover is allowed to stay on the planet as the best friend of Skiff (Seann William Scott), and Lem and Neera finally express their feelings for each other. Also starring Freddie Benedict as Eckle, Mathew Horne as Soldier Vesklin and James Corden as Soldier Vernkot. The voice casting is good as you can expect from a film like this, Johnson making a suitably daft astronaut and Long as the hopeless in love teen, the characters are all good fun, many of the laughs coming from the robot Rover, the story is simple to understand, and you can spit and giggle at the small spoofs of famous sci-fi films, like Alien, War of the Worlds, 2001: A Space Odyssey and The Terminator, it may be a little predictable, but the kids will love, and there is just about enough enjoyment for the grownups, a fun family animated fantasy comedy. Worth watching!

At least one major critic said that "Planet 51" was a one-joke movie, and I agree with that statement. Though the movie tries to reverse things by changing around the roles, it otherwise plays like movies about aliens visiting earth. The movie does try hard to have a sense of humor about the situation, but I didn't laugh, except for the part of the movie where a cover of "Greased Lighting" plays with sanitized lyrics. Another fault I found with the movie were the characters were pretty thin and one-note. As for the visual look of the movie, the art design and the animation is serviceable, but is notably missing the polish found in Pixar and other big budget Hollywood computer animated movies. Still, I feel that (young) kids may find the juvenile feel of the movie appealing, and will not feel that they've seen it all before somewhere, because they probably haven't. However, they won't understand the references to other (and better) science fiction movies.

"Planet 51" is an above average animated comedy which reverses 1950s science fiction movies, in which paranoid humans chase after the UFOs and extra terrestrials hiding in their midsts, by placing a human astronaut on an alien planet. The alien planet is suffused with 1950s American pop cultural artifacts, references and trinkets.The film works fairly well as a comedy, drama and adventure, but is of interest mostly for its conceptual designs, which fans of retro art and 1950s iconography should find cosy.Like most of these films, "Planet 51's" message is wholly hypocritical. Here we have a film preaching individuality, free thinking and the importance of "testing the Gods with a hammer", which adopts a completely conformist and formulaic structure.The film epitomises Hollywood science fiction; always looking backwards, always pillaging the past and glamming up 1950s scifi tropes with modern CGI/effects. Few science fiction films are able to genuinely look ahead. Most should not even be classed as science fiction.7.5/10 – For kids only. Worth one viewing.