First she sported leopard print and sky-high wedges. Then she went for leather-on-leather. Hilary Duff's post-baby wardrobe shows off her enviably slim figure, just two weeks after giving birth to baby Luca Cruz Comrie.

Hilary Duff was spotted shopping for clothes for her baby boy on Saturday. She had her hands full with shopping bags as she left The Pump Station and Nurtury in Hollywood wearing a loose gray T-shirt, black-leather paneled leggings, black leather booties and a floppy wide-brimmed hat.

It seems as if the 24-year-old is already whipping her body back into shape with trips to the gym. 20 minutes on the elliptical seems like an eternity!!! What the hell.... the young starlet tweeted to her 1 million fans on Saturday.

The beautiful blonde mother was first photographed on March 29 flaunting her post-baby body after a trip to the Nine Zero One hair salon in West Hollywood. Duff, who gave birth to baby boy Luca Cruz on March 20, looked slim and fantastic in leopard print Current Elliott jeans and Kelsey wedges from the Rachel Zoe Collection.

Heading back home to hang with munchkin, Hilary Duff tweeted after her hair appointment. Photographers snapped shots of the freshly-blonde beauty strutting down the street, slim and trim already!

Fans and friends tweeted to the young beauty, complimenting her post-baby look. @HilaryDuff girl, ur impromptu car self-portrait looks better than my headshots. all of them ever. not surprising given ur face, but still, wrote Duff's friend Aimee Parker. @HilaryDuff and that's my ridiculously stupid way of saying 'you look amazing'. x.

Hilary Duff ever-so-modestly replied, @aimparker You should have seen what I looked like last week.eek surprised I still have a husband! It was time to throw them heels on;) guurl.

The former Disney star seems to be quickly adjusting to life as a mother, waking up for 4 a.m. feedings for her baby boy Luca Cruz.

Luca fed! Mamma fed! Time to do it all again in 2 hours! Oh how life has changed! Lol In such a wonderful way :), she tweeted to fans, later adding, 4 am...Sleepy eyed. Feeding baby..whew this job is no joke!

Check out more photos of Hilary Duff's slim post-baby body on the Oh-Hilary fansite.