If there's one R-rated, car-chase action/comedy you see all year, make it "Hit & Run," which opens in theaters Wednesday (August 22).

The plot revolves around former getaway driver Charlie Bronson (Dax Shepard), who busts out of the Witness Protection Program to drive his girlfriend (Kristen Bell) to Los Angeles so she can land her dream job. Their road trip becomes increasingly complicated and dangerous when they are chased by the feds (led by Tom Arnold) and later Charlie's former gang of criminals (led by Bradley Cooper). Also, according to writer/director/actor Shepard, you'll miss out on some bona fide genre-breaking if you don't go see it.

"I don't say this in a bragging way, but it is definitely a genre-breaker," Shepard told MTV News. "It's got a lot of different things. It's really, really, really funny, and there are sweet car jumps in it, and then ultimately there's this really nice love story happening between Kristen and I," he explained.

"There's a lot of real moments between us that we're letting people sort of see into," added Shepard's co-star and real-life fiancée Kristen Bell. "Which was a very vulnerable thing to do but, at the same time, came so naturally, and five or six minutes into a scene, where we were really genuinely communicating, we watched the tape back and thought, 'Oh, wow, we got kind of something really honest there.' "

"It was kind of high-risk, because had we not had chemistry, that would have been rough for everyone," Shepard said.

"I think plenty of people have watched movies with people without chemistry," Bell cut in.

"Aha, but when they are dating, it's rough," Shepard pointed out. "When they are engaged, it's rougher."

When asked if the two lively lovebirds have plans for more "Hit & Run" movies or to work together again, they thought up a perfect reboot on the spot.

"I'd like to be Kurt Russell and Goldie Hawn and do four or five of these suckers together," Shepard said. "In fact, we should redo the boat movie, 'Overboard.' I'd be Jack, right?"

"I would have a shoe closet," Bell added. "This is perfect."

"Yes, look for [us in] 'Overboard' next fall in a marina near you," Shepard joked.

Check out everything we've got on "Hit & Run."

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