Jessica Alba has revealed that pregnancy has caused her to continuously kick fiancé Cash Warren out of their swank Los Angeles home.

The Sin City star – who is in her second trimester with the pairs first child - admits her emotions are "all over the place" and the slightest obsession can turn her into a sobbing mess.

"I think I threw him out of the house twice already since I've been pregnant,” said the 26-year-old. “He's like, 'Are you just pregnant? I hope you're just pregnant and acting crazy,' and I'm like, 'It has nothing to do with that.'

"And then we cry and we hug and he's like, 'You're preggers, what do you want?'

"Little things get me so mad... He calls five minutes later than he said he was going to. You get so emotional when you're pregnant, and so irrational. It's totally dumb."