There are a handful of noteworthy comedies hitting theaters in the Summer 2014 Movie Season, and only one of them (22 Jump Street) is a sequel. The rest of the slate includes R-Rated, star-driven, original comedy offerings, headlined by such funny folk as Seth Rogen in this week’s Neighbors, Seth MacFarlane in the upcoming A Million Ways to Die in the West, and Melissa McCarthy in the Fourth of July weekend release, Tammy.

Tammy, for those unfamiliar, was co-written by McCarthy, who’s become a box office heavyweight following her scene-stealing performance in the 2011 film, Bridesmaids. McCarthy’s husband, Ben Falcone – a frequent side player in his wife’s movies – is McCarthy’s script collaborator on Tammy, which is also Falcone’s debut as a feature director.

The teaser for Tammy only highlights McCarthy’s knack for verbal and physical comedy alike, focusing on an early scene where Tammy robs what is either her old workplace or part of the same fast food store chain, Toppy Jacks. By comparison, a newly-released full-length trailer more properly dives into the film’s plot, while still serving up plenty of McCarthy shenanigans.

This particular (mis)adventure is set in motion when the blue-collar Tammy (McCarthy) gets fired from her fast-food restaurant job and learns that her husband (Falcone – how meta) has been unfaithful. That’s enough turmoil to spur Tammy towards undertaking a road trip, in the hope of gaining some control over her life – which is easier said then done, when she ends up having to bring her alcoholic grandma Pearl (Susan Sarandon) along for the ride.

All in all, Tammy reads as being very much a prototypical road trip adventure, much like McCarthy’s last vehicle The Heat is a standard buddy-cop film; having female leads instead of men, however, helps to make the final movie results here seem more fresh than that. Still, the concern is that McCarthy might be on her way to becoming the next Will Ferrell, wherein her laughfests just start blending together. Hopefully, that won’t be the case – at least, not just yet, anyway.

The Tammy cast also includes Kathy Bates (American Horror Story: Coven), Sandra Oh (Grey’s Anatomy), Allison Janney (Masters of Sex), Dan Aykroyd (The Campaign), Toni Collette (Fright Night), Nat Faxon (The Way, Way Back), and Mark Duplass (Safety Not Guaranteed).

Tammy opens in U.S. theaters on July 2nd, 2014.