You, Me and Dupree (2006)

A best man (Wilson) stays on as a houseguest with the newlyweds, much to the couple's annoyance. - Anonymous

For newlyweds Carl and Molly Peterson, life can't get any sweeter as they begin anew to settle down into married life. With a nice house and established careers in tow, nothing seems to get in their way. However, Carl is about find out just how much friendship means when Dupree, his best friend has been displaced from his home and fired from his job because of attending their wedding. Taking his friend in, what Carl and Molly are about to experience is that the fine line between a few days and whatever else is after, can be a lot more than they bargained for. Especially when their friend overstays his welcome in far too many ways than he should. - mystic80

Carl Peterson, an architect, has just got married to Molly, and it seems that they're about to begin their happy life together. Everything is going fine, until Dupree, the best man and Carl's best friend, shows up to invade the couple's intimacy, having lost his job & home. Carl decides to help his old friend, giving him a shelter in the couch, thinking that the whole thing will be for 2 or 3 days. Despite Dupree promising Carl that he'll look for a job the very next day, the immature and lazy bloke spends the time playing with the children from the neighborhood, or dating with a mysterious librarian girl. Molly begins to get tired of Dupree, but Carl must deal with another problem, his malevolent and overprotecting father-in-law, who has warned him that he wants his daughter to keep her maiden name and that he shouldn't even think about having children with her. Apparently, Dupree has came to stay with Molly and the stressed Carl, who doesn't know how to get rid of him, becoming paranoid because the charismatic Dupree is starting to take his place in the household. - Alejandro Frias