Ali Larter: The Difference Between My Daughter and Son Is 'Amazing'

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Ali Larter says her life is “filled to the brim” now that she has two kids at home — who just happen to be polar opposites of each other.

The mom to son Theodore Hayes, 4½, and daughter Vivienne Margaret, 7 months, has enjoyed seeing the distinction between their personalities.

“It’s amazing for me to see the difference between having a little girl and a little boy,” the actress, 39, told PEOPLE on Friday while promoting her upcoming film, The Diabolical.

“My daughter is already so observant,” she shares. “You can give her a book and she will just sit and really look through it and touch it and explore it, where my son was really like, ‘Look at me, talk to me, play with me, give me your attention.’ He is just a force of nature, and she’s just like a sweet little angel and she asks for so little.”

Larter says taking care of a newborn has been easier the second time around, but there are some drawbacks to dividing her attention.

“There’s a huge difference in my comfort level and my trust within that,” she shares. “That being said, I still feel bad because she doesn’t get nearly as much attention as Teddy did, and then you’re back to work and it’s busier than ever. There are two sides of the coin.”

Luckily, the actress has a little extra help, as Theodore has easily slipped into the role of big brother.

“He’s such a great big brother,” says Larter. “He makes her laugh, he plays with her, he helps give her her bottle. He’s so, so sweet with her. That four-year age difference has really worked out for us.”

— Gabrielle Olya