Jennifer Aniston stars in The Bounty Hunter this weekend -- but the preview for her in vitro flick, The Switch, has just hit the Web.
The movie, which was originally called The Baster, follows Aniston, 41, as she uses a sperm donor to get pregnant. She later finds out her best friend Wally, played by Jason Bateman, switched the cup so he's the father of her kid.
It's due to hit theaters this August.
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