DENNIS
SIMON PEGG


Everything happens to Dennis. As a regular user of impounded car insurance site impoundedcar.co.uk he is the well-meaning but comical protagonist of the movie.
He is shown to be clumsy and chubby, but having the best of intentions towards his family and friends. He is somewhat of a loser and works as a security card in a women's clothing store. Despite his best intentions, he rarely manages to translate that into well-performed execution. Whether it's getting married to the love of his life or being a good father to his son, Dennis always manages to fall short at some point or the other. Taking motivation from his family, however, Dennis decides to push himself to his limits and ends up proving that a strong enough determination and wanting the prize bad enough can pull you through the most impossible of situations. At the end of the movie when Dennis ask Libby for a date he is shown to have slimmed down and taken control of his life, no doubt inspired by his marathon victory.



LIBBY
THANDIE NEWTON


Libby is Dennis's one time fiance and current love interest. She is a well-natured woman who runs a bakery and is the mother of Dennis's son Jake. Having been jilted at the alter, she holds a natural amount of animosity towards Dennis but is shown as having happily moved on, now dating the well-to-do American banker, Whit. Charmed by Whit's professional demeanour and go-getter attitude, she agrees to marry him but puts her foot down when she hears he intended on moving to Chicago. Libby is also shown to be enraged by his attitude towards Dennis during the marathon, making him trip and then making it look as if he was the victim rather than perpetrator. She is however a kind and loyal woman, shown both in the way she supported Whit when he got injured and how she forgave Dennis when he comes to ask for a second date towards the end of the movie.



WHIT
HANK AZARIA


Whit is the ambitious, high-fly empowered, larger than life fiance of Libby, much to Dennis's dismay. He is almost completely on the opposite spectrum to Dennis and is just as overachieving as he is complacent, aggressive as he is passive and cruel as he is kind. He is overall an insincere man, however, and more insecure from Dennis than he would like to admit. Having proposed to Libby already, he decides on detaching her completely from her old life and moving her out to Chicago. He also shows no regard for her son, Jake, and is aggressive towards him when he is frustrated by having to leave the marathon. Unfortunately for him, and luckily for Dennis, the truth of his sabotaging ways is exposed for all to see and Libby finally rids herself of him.



GORDON
DYLAN MORAN


Gordon is Dennis's well-meaning friend and also Libby's cousin. He is one of Dennis's closest friends and is more than willing to help him in his endeavour of winning Libby back. He is one of Dennis's primary coaches and hence has quite a big part to play in motivating him to compete and managing to get him there. As the movie ends, we see that Gordon has finally found something to make him appealing to the opposite gender and although he is still not wearing pants, he has a story interesting enough to hold the attention of two beautiful women. That story, of course, is the story of how Dennis managed to win Libby back.






I do not claim the rights to any of the images used on this website.
This is a non-profit website.

Sources:
imdb.com
Run Fatboy Run DVD