The Sin City star, who is a parent to 3-year-old daughter Honour and 7-month old Haven Garner with husband Cash Warren, said that the most difficult part of raising two small children is dividing her time between them.
In a new interview with lilsugar.com, Alba explained: "I think going from no kids to one kid was the biggest adjustment. Once my older one was out of diapers and was a little bit more self-sufficient, I found that having another one was easier than it would have been if I had two in diapers.
"I think the toughest part is probably just your time. You still want to spend time with both of them and you find you have less time for yourself. Once [Honour] is down for her nap then I have the baby and I get to spend time with [Haven], where I used to be cooking or doing emails or reading or talking to a girlfriend. So now it's about organising my time and trying to be as efficient as possible."
Alba recently admitted that she lies to her children to keep them safe, telling them that everyone gets hounded by paparazzi.
The 30-year-old has insisted that work takes a backseat to family and that her kids will always be more important than her career.
Watch Jessica Alba in the trailer for Spy Kids 4: All the Time in the World below: