Jack and Jill vs. The World (2008)

Jack is a N.Y.C. advertising executive with a life as glossy as the commercials he spins. Jill is new to the city, with nothing to stand on but her fiery personality and romantic ideals. Opposites attract, and together they author their own manifesto of "rules to live by." But Jill betrays Jack by violating rule one - Be Honest.