- HD 1080
- Runtime: 100m.
- Status: Released
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- Languages: en
- Country: United Kingdom, United States of America
- Director: David Schwimmer
- Stars: Simon Pegg, Thandiwe Newton, Hank Azaria, Dylan Moran, Harish Patel
- keywords: new love, parent child relationship, pregnancy, fiancé, training, jogging, marathon, rent, wedding
- Production_studio: Entertainment Films, Material Entertainment, Beech Hill Films, Gold Circle Films
- Slogan: Love. Commitment. Responsibility. There's nothing he won't run away from.
- The Run Fatboy Run is featured in the top rankings of 2007
- #88 in Top Romance Movies of 2007
Five years after jilting his pregnant fiancée on their wedding day, out-of-shape Dennis decides to run a marathon to win her back.