Jennifer Aniston is back on the big screen next month as she teams up with Jason Bateman for The Switch.

Aniston stars in this offbeat comedy as Kassie, a smart, fun-loving single woman who, despite her neurotic best friend Wally’s (Bateman) objections, decides it’s time to have a baby, even if it means doing it by herself … with a little help from a charming sperm donor (Patrick Wilson).

But, unbeknownst to her, Kassie’s plans go awry because of a last-minute switch that isn’t discovered until seven years later when Wally finally gets acquainted with Kassie’s cute, though slightly neurotic, son.

From the people behind “Little Miss Sunshine” and “Juno” comes “The Switch,” due in theaters this summer.

The Switch is released 1st September. Take a look at a couple of clips from the movie:

Jennifer Aniston and Jason Bateman star in The Switch, directed by Josh Gordon and Will Speck (Blades of Glory) and produced by Albert Berger and Ron Yerxa (Little Miss Sunshine, Cold Mountain).

With its romantic Manhattan setting, established comic performances and warmly uplifting sentiment, The Switch is released in cinemas nationwide on 3rd September 2010.

Kassie (Aniston) is a smart, fun loving, single woman who decides she wants a baby. Despite her neurotic best friend Wally’s (Bateman) objections, she chooses to go for this on her own and opts for the services of a charming sperm donor (Wilson).

Unbeknownst to Kassie, her plans go awry when Wally drunkenly makes a last minute switch that isn’t discovered until seven years later when he finally meets her precocious, though slightly neurotic, son.

Released 3rd Spetember. Take a look at the first trailer for the movie: