Why Jessica Alba Had a 'Freak-Out' Moment When She Turned 30

— -- Jessica Alba looks as good at 33 years old as she did back when she was 20, maybe even better.

But the "Sin City: A Dame to Kill For" actress said when she hit the big 3-0, she had a bit of a moment.

"I had this ‘Aaagh!’ I’m not in my 20s anymore! What does it all mean?’ kind of freak-out," she told SELF magazine for its August cover. "[But] I feel much better at 33 than I did at 23, even than I did at 30.”

Jessica Alba: Why I Lied About My Sexuality

Jessica Alba Doesn't Do Nudity Because It Would 'Be Weird at Christmas'

The next obvious question is how does she look so good at 33 after two daughters Honor, 6, and Haven, 2.

“I hate working out. It’s boring!" she told the magazine. "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!”

Now she's back for the next installment of "Sin City" and looks stunning in her SELF photoshoot.

She revealed how she is passing down her healthy philosophy to her kids.

"We eat mostly lean protein and fresh fruit and vegetables, nothing processed or from a box, if we can," she said. "For me, when I don’t eat a ton of carbs, I have more energy. But I’ll for sure have a piece of chocolate. I will mow through a bowl of guacamole. If I’m not going to have dessert, I’ll have a martini.”

Finally, the actress dished on her secret to happy marriage with her husband Cash Warren.

“You’ve got to have the girls’ night out to complain about your husband or whatever it is," she said. "You have some fun, then you can go and enjoy the work, and you can take pride in it instead of it depleting you and being a burden.”

The SELF August issue with Jessica Alba hits newsstands nationwide on July 29.