Yahoo! Movies has just posted the brand new teaser trailer for the upcoming Jim Carrey comedy, Yes Man, which will be released in theaters on December 19. Click below for your first glimpse at this new comedy.

Based on a memoir by British author Danny Wallace the studio picked up in April 2005, the story centers on a man who decides to change his life by saying yes to absolutely everything that comes his way. Saying yes leads him on a series of unexpected comedic adventures that turn his whole life upside-down.

Jim Carrey stars as Carl Allen, a man who signs up for a self-help program based on one simple principle: say yes to everything...and anything. At first, unleashing the power of yes transforms Carl's life in amazing and unexpected ways, but he soon discovers that opening up his life to endless possibilities can have its drawbacks.