BEIJING, March 24 -- Jessica Alba is working "overtime" to get pregnant again

The actress - who gave birth to daughter Honor Marie last June - and husband Cash Warren are keen to add to their family and want to conceive by the end of this year.

    A source said: "Jessica and Cash are working overtime to get pregnant. She and Cash are boasting that they love being parents and are determined to expand their family as soon as possible."

    Jessica, 27, recently revealed how giving birth had given her life a new meaning. She said: "So far, motherhood is the best thing ever. It is exhausting but way more fulfilling than anything I have done. Everything I do now is so much more meaningful because of her."

    The stunning star also claimed the labour wasn't as painful as she expected. She said: "Contractions aren't that bad. If you've ever had bad cramps? That's what they're like. But that moment when they put the baby on your chest - that's deep. It's a deep experience."