i can not understand why imdb user would rate this movie 5. negative . it really be great and very funny . i would strongly recommend this movie for all of you and adult and teenager and especially child . the story be about a 14 year old kid who always tell lie and at home and school . one day he have his homework of write a 1000 word story . but he do not and so the teacher tell him to write it and give her in 3 hour and or he would have to go to summer school . yep and he write it in 2 represent45 . big fat liar and i think it be a story of himself . on the way to the school he hit a limo of a famous hollywood producer and and he give him a ride . but the kid forget the story in the limo . he tell his parent and the teacher and but of course and they do not believe him . and the movie producer and he take the kid story a his new movie and big fat liar . when the kid saw the trailer of the movie and he tell his parent he have write it and but they do not believe . so and he and his friend have to go to l. a to prove one thing represent the truth be never overrate enjoy this great movie and you would not be disappoint . don not trust the 5. negative rate and it should be positive . believe me . p or s represent so sorry and my english isn not good enough to make a good comment .