Final answer:
The 2009 movie with a star-studded cast including Ben Affleck, Jennifer Aniston, and Bradley Cooper, based on a self-help book inspired by a line from "Sex and the City", is "He's Just Not That Into You".
Step-by-step explanation:
The 2009 movie with an ensemble cast that included Ben Affleck, Jennifer Aniston, and Bradley Cooper, based on a self-help book which itself was based on a line of dialogue from "Sex and the City", is "He's Just Not That Into You".
This film explores the misinterpretations of human behavior in romantic relationships. It was inspired by the bestselling self-help book by Greg Behrendt and Liz Tuccillo, which was, in turn, inspired by a line from the popular TV show "Sex and the City".
The movie interweaves multiple storylines reflecting the complexities and misunderstandings in modern relationships, and it utilizes humor to depict the struggles of reading or misreading human behavior.
Whether you're a fan of the talented cast, interested in the dynamics of contemporary relationships, or curious about how a cultural catchphrase can evolve into a widely recognized concept, this movie provides an entertaining and thought-provoking viewing experience.