Warner Bros. has released the first trailer for director Ben Falcone’s upcoming road trip comedy Tammy.  The film stars Melissa McCarthy as a woman who takes a road trip with her diabetic/alcoholic/foul-mouthed grandmother (Susan Sarandon) after she’s laid off from a fast food restaurant and discovers that her husband is having an affair.  This first teaser focuses squarely on McCarthy, who appears to be doing her best Shia LaBeouf impression right off the bat.  It's a great example of a teaser, since only the barest bones of a plot are on display.  If you like the humor in this minute-plus, there's a good chance you'll want to check out the full movie.

Hit the jump to watch the trailer.  The film also stars Allison Janney, Gary Cole, Mark Duplass, Toni Collette, Nat Faxon, Dan Aykroyd, and Kathy BatesTammy opens July 2nd.

Click over to Apple to watch in HD.

Here’s the official synopsis for Tammy:

Tammy (Melissa McCarthy) is having a bad day. She’s totaled her clunker car, gotten fired from her thankless job at a greasy burger joint, and instead of finding comfort at home, finds her husband getting comfortable with the neighbor in her own house. It’s time to take her boom box and book it. The bad news is she’s broke and without wheels. The worse news is her grandma, Pearl (Susan Sarandon), is her only option—with a car, cash, and an itch to see Niagara Falls. Not exactly the escape Tammy had in mind. But on the road, with grandma riding shot gun, it may be just what Tammy needs.

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