500 Days of Summer is an upcoming romantic comedy film about a man that falls hopelessly in love with a woman who doesn't believe in love.

The movie is topbilled by Joseph Gordon-Levitt (10 Things I Hate About You, G.I. Joe: The Rise of the Cobra) and Zooey Deschanel (Weeds, The Happening).

It was written by Scott Neustadter and Michael H. Weber, directed by Marc Webb and produced by Mark Waters.

Logline: Tom, a would-be architect who works as a writer of pithy romantic sayings for others yet can’t seem to communicate the overpowering depth of his own feelings to the only woman who matters to him: the elusive Summer (Deschanel).

Also starring in the film are Chloë Moretz, Geoffrey Arend, Matthew Gray Gubler, Clark Gregg and Minka Kelly as Autumn.

“500 Days of Summer” opens October 21 in theaters from 20th Century Fox to be distributed by Warner Bros.

VIDEO LINK: 500 Days of Summer – Trailer

Here are some stills from the movie: