We're not sure, but could Jessica Alba look any better than she does in her new underwater thriller "Into the Blue?"

Well, apparently someone somewhere thought they could make her look even better, Jessica told Access Hollywood's Tony Potts during our recent interview.

"How about that poster of you guys?" he said, commenting on the promotional poster showing a scantily clad Jessica standing next to co-star Paul Walker. "There's hardly any clothes on there."

"I know. They enhanced it a little bit," she revealed.

"What did they enhance?" Tony had to ask.

"Right there," she said, pointing to her chest. "They always do it. And in [the poster for] 'Fantastic Four,' please – they did it big time!"

But does Jessica have any control over that sort of stuff? More importantly, does it bother her?

"I really don't think it's that big a deal. It's a movie poster," she admits. "It's all pretend. It's all airbrushed."

But there was no trick photography used during Jessica's underwater scenes in her new film where she continually shows off her sleek figure.

In fact, most of the scenes leave little for Alba fans to imagine – which was just fine with co-star Paul Walker.

"Well, you look at her and you go 'Oh my gosh, that girl is just gorgeous,'" Walker told us.

But don't be fooled by the physique, as Paul explained.

"Paul Walker said that you are really feminine but deep down, you are still a tomboy. Is that a fair assessment?" Tony asked Alba.

"Yeah, that pretty much sums me up," she smiled.

As Jess showed us she was anything but a girly girl as she and Tony scaled a patch of offshore rocks to get to our interview spot.

"Piece of cake," she grinned.

And while both Jessica and Paul spend most of the movie showcasing their top-notch physiques, Alba said her traditional Catholic parents Cathy and Mark might not approve.

"I wasn't allowed to wear a bathing suit in the house when I was a kid," Jessica explained. "I would get spanked and they would be like, 'Put your clothes on' … not like a bad spanking but my grandma would get the fly swatter and make us get our clothes on."

Luckily, it doesn’t look like Jessica's grandma had any input on her outfits for the film.

Fans can catch Jessica and Paul in "Into the Blue" when it hits theaters September 30.