Hilary Duff's post-baby bod is looking hotter than ever!

Hilary explains to Us Weekly how she got her body back after giving birth to her son Luca, now 11 months.

"My one trainer helped me lose a s**t ton of weight," Hilary says. "I lost like 30 pounds." Get it, girl!

"I live in the canyon, so we just run," she says of her trainer. "He runs my ass up and down the hill."

"We do some circuit stuff and boxing, which is a lot of fun and you get out a lot of s**t that way," she continues.

Hilary adds that her husband, Mike Comrie, has been quite the doting papa.

"He's the best dad," Hilary says. "When I see him with Luca, it's beautiful, it's like happy, it's bliss, it's wonderful, so it's really, really sweet." Aww!

Sounds like the family could hardly be happier these days!

Source: Us Weekly