Looking trim in a sheer top, low jeans, and towering heels, the 41-year-old presenter appeared to have shifted her baby weight in record breaking time. She strutted her stuff for the cameras with her enviably flat tum - and belly button - clearly visible through her near-see-through top.
Before leaving for her night out, Julia told her Twitter followers: 'Off to premiere of Cowboys+Aliens. No baby in tow, just a pair of killer heels. Pow pow Gotcha!'
Zephyr is Julia and property developer boyfriend Gerard Cunningham's first baby - the couple had feared they would never conceive after Julia was told she had endometriosis when she was 33.
We'd love to know how Julia's - and all those other celebs' - pinging-back-into-shape secrets!
What was YOUR secret to regaining your post-baby figure? Strict diet and exercise? Breastfeeding? Spanx? Or something else?