Fans were quick to flock to the image, praising the new mum.
'You look incredible post bub 😘,' one wrote.
Another added, 'Body 🙌🏽🙌🏽🙌🏽💋'
Agreeing another gushed, 'Fun Loving Faboulous Mum'
Tessa and her husband, former NRL star Nate Myles, recently welcomed their son - Saynt Myles.
The family have been living in LA for the past few years, as Tessa works on her acting career.
Notoriously secretive, the couple are yet to share photos of their new bub.