What's the name of this romantic movie?

There's a rich girl who's engaged to a guy who doesn't care for her. The guy has a friend named Ollie and Ollie unknowing falls in love with his friends fiancé. He spends the movie trying to help his friend win her back after his friend messes up. At the bachelor party for their wedding though, the... show more There's a rich girl who's engaged to a guy who doesn't care for her. The guy has a friend named Ollie and Ollie unknowing falls in love with his friends fiancé. He spends the movie trying to help his friend win her back after his friend messes up. At the bachelor party for their wedding though, the groom hooks up with another girl and Ollie realizes he's wrong for the woman he loves. He confesses his love and gets the girl. Please help!
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