Hilary Duff gave birth to baby Luca Cruz just nine days ago; but the new mother already looks unbelievable.

The 24-year-old flaunted her post-baby body after visiting West Hollywood hair salon Nine Zero One on Thursday. Just got my hair did from my girl [Riawna Capri] thanks love! I'm feelin fresh, she tweeted, along with a photo of her new hairstyle. Heading back home to hang with munchkin. Photographers snapped shots of the freshly-blonde beauty strutting down the street, slim and trim already!

He's very cute! Duff told PopSugar after exiting the salon and making her way to her Mercedes. On choosing the name, Duff said it was a simply choice, We liked it.

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.

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.

We highly doubt that the starlet and new mother has looked anything but gorgeous since giving birth to Luca Cruz, though she did tweet that motherhood is no joke.

The singer and actress took to Twitter on March 22 to announce the joyous news to her fans. Welcome to the World Luca Cruz Comrie! Tuesday evening, we became proud parents of a healthy 7 pound 6 ounce beautiful boy, she tweeted. We are overjoyed and feel like the luckiest parents in the world. He is surrounded by so much love!! Mom and baby are both doing extremely well.

Hilary Duff announced her pregnancy in August via her official website. The announcement came on the same date as her first wedding anniversary to former hockey player, Mike Comrie, who retired from the NHL after 10 seasons in February following his third hip surgery.

I can't believe it has already been a year, time really flies when you're having fun!! We also want to share the exciting news that...... BABY MAKES THREE!!! she wrote to fans.

My husband makes this joke that I think I'm pregnant like 12 times a year, Duff told Ellen DeGeneres in October. So when it actually happened ... he was in the shower and I just held up the test and I was like, 'Oh my God.' And he was like, 'Ahh!' He was soaking wet. We were just a mess and started crying. It was really exciting.

Luca Cruz is the first child for Duff and husband Comrie.

Check out HollyWire for more photos of Hilary Duff.