Alba looked happy and gladly posed for photographers from different angles, so that the public could get a better look at her belly.
Although Jessica Alba looked effortlessly glamorous in a black lace gown on the red carpet on Saturday, she says her third pregnancy hasn't always been a breeze.
"I like that I actually feel glamorous", Alba told InStyle and other reporters at last night's event held at 3Labs in Culver City, CA. "I don't feel glamorous at all when I'm pregnant, so it's nice to kind of dress up and feel handsome. In this dress I actually feel kind of pretty and yes very glamorous".
The actress revealed she and her producer husband Cash Warren are looking forward to welcoming a little boy into their home as their house has been full of females for so long.
"I resurrected her film career", Downey, Paltrow's "Iron Man" co-star, quipped during the message, adding that in three words he would describe her as: "Sister I've kissed".
Jessica recently admitted her youngest daughter was initially apprehensive about having a new sibling, but she has since warmed up to the idea.
She shared: "My six year old, she was anxious about being a middle child, but she gets to be a big sister and a little sister".
"For me. the girls love their dad", she said. So, she's stoked about that - and she doesn't have to compete with another girl. "I wanted someone to love me more. I cook, I do all the things!'"