Hilary Duff Shares Another Pic Of Baby Luca!

What a fast learner!
Hilary Duff‘s baby son Luca is only one month old and he’s already holding up his upper body!
Hil recently tweeted the (above) photo and wrote:

Tummy time stud muffin…liftin his head like that!

Wow, we’re impressed! What a little champ!
[Image via Twitter.]