Five years ago, nervous bridegroom Dennis (Simon Pegg) left his pregnant girlfriend Libby (Thandie Newton) at the altar. Now, he realizes he made a big mistake and is determined to win her back. Unfortunately, Libby is involved with a handsome, attentive and fit financier (Hank Azaria), who is set to run in a charity marathon. Hoping to impress Libby, out-of-shape Dennis enters the race, even though he only has three weeks to prepare.
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In "Run, Fat Boy, Run," Simon Pegg plays a character the other characters Simon Pegg has played would probably hurl beer cans at in disgust. This unrepentant loser is a far cry from the unrepentant losers he has played in his own British sitcom "Spaced" and his cult zombie flick "Shaun of the Dead." At least those slackers held their heads high, instilling themselves with enough dignity and pride to keep them from wallowing in defeat and jumping off the nearest bridge. The pitiful schlub he plays here makes those self-respecting slobs -- and self-respecting slobs all over -- look bad. (Full review)