Showing no signs of slowing down while having a baby on board, the former "Lizzie McGuire" actress took to her afternoon workout in a comfy black t-shirt and green sweat bottoms.
Meanwhile, four-and-a-half months along Hilary has opened up about her plans post-pregnancy, telling E!, "I want to get into the studio. I want to start recording. Even if I just mess around and kind of get myself in the swing of it. Before I got pregnant I was thinking about making a record so I still want to do that"
The glowing mom-to-be added, "I think that after I have the baby I'll want to sit still for a few months and learn how to be a really good mom and then there's no reason why I can't put a record out and tour...It might take a little while but I'm really excited about it."
Enjoy the pictures of Hilary Duff leaving her Los Angeles, California gym (October 20).