Jessica Alba has announced that she is expecting her third child with her husband Cash Warren with an adorable Boomerang video – check it out!

The 36-year-old actress shared her good news on Instagram with a sweet video featuring the couple's two daughters, nine-year-old Honor and five-year-old Haven.

The Sin City star stands with one hand on her blossoming belly holding a balloon shaped like a number three.

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She captioned it: "@cash_warren and I are officially going to be outnumbered #babyonboard #herewegoagain #blessed"

Alba recently spoke to E! News about the ups and downs of being a parent. She said: "Well first off, you feel bad when you realise they are wearing shoes that hurt them because you're like, 'Oh, I didn't even realise that you've been wearing shoes that are too small for you for like 3-4 months, my bad."

Jessica Alba with her husband Cash Warren and her daughter Honor and Haven

"Some of those milestones or moments, you want to be there for every single one and it's not realistic when you're working, but for me, that's what gets me," Alba shared.

"Even the everyday little things like picking them up from school are a big deal, so I drop them off at school most mornings and try to get home for bedtime.

"But the weekends are really when I get to spend the time with them."