500 Days of Summer (2009) - IMDb
Directed by Marc Webb. With Zooey Deschanel, Joseph Gordon-Levitt, Geoffrey Arend, Chloë Grace Moretz. An offbeat romantic comedy about a woman who doesn't believe true love exists, and the young man who falls for her.
Marc Webb at an event for 500 Days of Summer (2009) Marc Webb in 500 Days ... my head until near the end of the film when I realized it was perfectly accurate.