Although the actress hasn't confirmed it, E! News is reporting that the 36-year-old is expecting twins with her husband Marco Perego, and the pair are both said to be thrilled at the news.
It's thought Zoe is three month's pregnant with her first bundles of joy. In an interview back in 2012 she said she hoped to have between two and five children, so she's definitely making some progress on her plans.
The actress was glowing in a floaty white dress when she arrived at a photo call for her new flick Guardians of the Galaxy in London yesterday.
The Avatar star was in the capital with the film's co stars, including Karen Gillan (pictured), and has been strutting her stuff on the red carpet since arriving in the UK.
Zoe married her beau Marco last year, months after they began dating, and recently she spoke to Marie Claire about their relationship. She said: "I don't do the ABCs. I do what my heart says, what my heart feels.
"So from the moment I met my husband, we were together. We knew."
We've been a big fan of Zoe's style for some time now and she's become one of our style crushes. Now we can't wait to see more maternity looks from this mum-to-be.
LOVE ZOE'S LOOKS? Well have a little flick through to see some of our faves here!