AceShowbiz -

Just days before "The Bounty Hunter" is released in U.S. theaters, another film starring Jennifer Aniston has started its campaign. And the first sneak peek to the film titled "The Switch" has made its way out via Apple.

Starring also Jason Bateman, the film tells the story of a single woman, Kassie, who wants to have a baby through artificial insemination. But one drunk night has made Kassie's plans go awry as her best friend Wally switches someone's semen with his own.

After seven years passed, Wally finally finds out that Kassie's son carries his blood because the boy has a neurotic problem similar to him. Now, he is determined to be a good father for his child without telling Kassie the truth.

Jennifer Aniston plays Kassie while Jason Bateman takes the role of her neurotic friend, Wally. They are additionally joined by Patrick Wilson, Jeff Goldblum and many others on the cast ensemble. This romantic comedy, which is initially titled "The Baster", will be dropped in theaters across the U.S. on August 20.