They're inseparable!

Yesterday, Hilary Duff decided to take her adorable little boy Luca out with her as she did a bit of shopping at Neiman Marcus.

The 25-year-old actress and mother has enjoyed motherhood but recently admitted that things weren't always sunshine and lollipops.

"I was enjoying being home with my baby, and I wasn't super strict with my diet," she told Life & Style. "I never had to lose so much before, and it took a while to get mentally motivated. I'm finally at a comfortable place with my body."

Looks like her regime, which included a revamped diet & boxing, paid off!

On Thursday Hilary Duff and hubby Mike Comrie took their bouncing baby boy Luca out to a lil' play date for the day ... what a cutie!

Earlier in the week Hilary took her 13-month-old to get his first haircut at the Tipperary salon for kids in Beverly Hills, and she recorded the milestone event on her iPhone with pictures and video. He certainly is growing up fast!

While the 25-year-old actress has been busy on mommy duty, she has managed to keep her career afloat, having appeared in last night's episode of Two and a Half Men. When Hil chatted with Mario Lopez the other day about her guest spot for the show she said of her character, “She’s a little sex-crazed junkie! I mean, I get to play a crazy party girl.”

Guess Hil and her hubby will put Luca to bed before checking that out!

We can't believe how fast Hilary Duff's little boy is growing up!

Hilary carried her adorable son Luca out of a Mommy and Me class in the valley on Wednesday, and not only is he no longer a baby, but she's looking super svelte these days!

When she's not on parent duty or shopping, she's slowly getting back into acting. We already knew she was guest-starring on Two And A Half Men, but we totally forgot her episode aired today! Last night Hil tweeted, "Guess what?! I'm gonna be on the season finale of #TwoAndAHalfMen tomm! Thursday @ 8:31pm ET/PT on CBS! Don't be a minute late ;)." Can't wait to check it out!

Hilary Duff and Kimberly Stewart showed off their cute mommy styles Saturday, giving their kids a ride on their hips ... hipsters in training!

Hil toted son Luca to pal Jack Osbourne's house -- probably for a playdate with his daughter Pearl. Meanwhile, Kimberly took daughter Delilah to a party in her adorable summer dress. So cute!

This isn't as good as Lindsay Lohan shacking up with Charlie Sheen in Anger Management, but we'll definitely tune in!

Hilary Duff is set to play Ashton Kutcher's love interest in the season ten finale of Two and a Half Men, according to TVLine. Duff will play Stacey, a woman who starts dating Kutcher's character Walden, only to have her grandmother swoop in and woo the billionaire internet entrepreneur. Marilu Henner will guest-star as the hot granny, and the finale is scheduled to air May 9.

Just a few months ago Duff had a guest spot on Raising Hope, and she reportedly still has a development deal with 20th Century Fox for her own show. Can't wait to see some clips and stills of this!

Awww!

On Thursday Hilary Duff and her hubby Mike Comrie were snapped taking their darling son Luca to a play date in Los Angeles, and we can't believe how big the little boy is getting! Wonder if he's going to end up looking more like mom or dad?

In other news, Tia Mowry recently revealed that she looked to Duff for inspiration when she was struggling to lose the weight she gained during her pregnancy. Duff told Us Weekly last year that "if you ask any pregnant mom, they're like 'I want my body back,' but it takes time. It takes nine months for your body to get that way, and it's putting on that weight on purpose."

"Hilary Duff is someone that I looked up to," Mowry said, adding, "At first you're shocked. You're like, 'My body's completely different.' Your boobs are in your face, you have stretch marks, you have curves that you never had before."

Thankfully it looks like Hil has just about burnt the last of it off...

She's lucky her mom lives so close, because she's got a built-in babysitter!

Hilary Duff left son Luca with his grandma in Studio City while she attend a Pilates class nearby, and the minute the singer was done with her workout, she rushed to pick up her baby boy and take him home.

The Lizzie Maguire star has definitely shed all the baby weight... and then some! Clad in black spandex pants and a tight white top, Mike Comrie's wife looked skinnier than we've ever seen her!

Hil's about to get a lot more exercise now that her little one is walking!

The other day, the actress tweeted a picture of Luca walking around on the lawn in his diaper chasing bubbles!

They say running around after your kids is the best way to burn calories, so she might not even need Pilates anymore!

Nothing like treating yourself to a shopping trip!

Yesterday, Hilary Duff decided to let her hair down as she hit the streets looking relaxed to stroll through some stores in Beverly Hills.

The 25-year-old actress has been all about her baby boy Luca lately and after celebrating his first birthday earlier this week, some alone time seemed to be in her sights.

Sometimes retail therapy is all you need!