Go behind the scenes during Jessica Alba's cover shoot

Jessica Alba just said what a lot of people are probably thinking: She hates working out.

That makes two of us, sister.

The stunning "Sin City: A Dame to Kill For" star, who covers the August issue of Self magazine in a curve-hugging indigo gown, let the fitness mag in on her surprising little secret.

"I hate working out," the 33-year-old said in a teaser to the interview. "It's boring! I really only did it when I had a job that was physically demanding. But from age 17 until I was 27, all I did were movies that were physically demanding — so all I did was work out all the time!" 

Indeed, the mother of two has appeared in TV series including "Flipper" and "Dark Angel" as well as action flicks such as "Sin City," "Into the Blue" and "Fantastic Four" from 1998 to 2008 that put her figure front and center and likely boosted male attendance at theaters.

But things changed in 2008 when she had her first child with husband Cash Warren, whom she'd married that same year after meeting him on the set of "Fantastic Four."

"After I had Honor, my first child, I worked out to get back into shape. Then I stopped. Then I got pregnant with Havie, and I worked out a bit after I had her, but then I stopped once I hit a weight that I felt fine with, because it's just boring," she told the mag.

But that doesn't mean she doesn't ever work out; it's just that she has a fickle relationship with it.

"Recently I've started to work out for stress," she said. "I realize that I just need to give my mind a break. When you're being pulled in so many different directions — and I've done more this year than I have in the last six or seven — it's full-on. If you don't get rid of some extra energy, you can internalize it, and it becomes so unhealthy."

Incidentally, the actress went on to say in the mag's behind-the-scenes video that working out has become her "genuine 'me time' " and "time of solace," adding that she has a "pretty balanced" diet that incorporates a lot of fresh and organic food.

Last year, the Honest Co. founder revealed that she wore a double corset to conceal her baby weight after having her two daughters.

"It was brutal; it's not for everyone," she told Net-A-Porter's digital magazine. "I wore a double corset day and night for three months. It was sweaty, but worth it."

So how did she get in shape for her stripper role in the "Sin City" sequel, which is due Aug. 22? Not by using double corsets.

She danced, the mag suggests, and used her 24 hours in a day better than most, according to her fitness trainer and choreographer.

"It's more about having fun and doing something that's interesting," Alba said.

Easy-peasy, no? No.

The August issue hits newsstands on July 29.

Next we'll hear that all she eats are cheeseburgers or something. Follow me on Twitter @NardineSaad.