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It's no secret that Hilary Duff's son Luca is too cute for words—as evidenced by the plethora of pics on the proud mama's Instagram. 

The actress' only child, whose father is Duff's estranged husband Mike Comrie, turned three years old last month and he's getting bigger by the day! 

So does the blond beauty hope to give her son a sibling in the future? E! News caught up with the former child star, who is currently promoting her TV series Younger, as well as her new single "Sparks," to get the scoop on the possibility of baby No. 2 in addition to the mother of one's thoughts on her toddler entering showbiz.  

VIDEO: Hilary Duff reacts to Kylie Jenner hair comparisons!

Hilary Duff, Luca, Instagram

Instagram

"I can't even put into words exactly what he's done to me," the doting mama gushed of her son. "He's captured my whole heart and having children is such an amazing experience. I love him so much; I'm so obsessed with him.

"I definitely want to do it again," she continued, confirming that she hopes to have more children in the future. "But right now, it's time for me to focus on work and the things I love to do outside of him and find what that balance looks like." 

Duff filed for divorce from the retired NHL star in February, just over a year after it was revealed that they had separated. Since their split, the friendly exes have been successfully co-parenting their son, even reuniting last month to throw the adorable tot a third birthday party

PHOTOS: Cutest kids on Instagram

Hilary Duff, Luca, Instagram

Instagram

"My baby pictures look so much like, Luca, it's crazy. He's definitely a hybrid. I think as he gets older, he's looking more and more like his dad, but then some days when I wake up, I'm like ‘you look exactly like me when I was little,'" she shared of her little one. "So all of our baby photos are pretty similar and it's awesome—it's so great to see yourself in your kid. And to see, you know, Mike in him, too. He's definitely a little hybrid." 

While Duff is hopeful about the possibility of baby No. 2, the former Disney star is currently enjoying focusing on her career. 

Hilary Duff, Luca, Instagram, Birthday

Instagram

"Obviously I want to go through all of that [having kids] all over again. The baby phase was so fun," she said. "I honestly have not had a bad time with him, he's such an easy kid, but yes, I have not sat down for like three years. He's full of it." 

Press play to hear Hilary's thoughts on Luca entering showbiz! 

PHOTOS: Hilary & Luca's cutest pics