Hilary Duff is one proud mama and is loving watching her son Luca grow up.
"Every age has always obviously been great. It does get better and better," Duff told E! News exclusively. "Four's a little tough, not gonna lie."
"There's been a few challenges but he's, I guess how well he communicates and how funny he is and getting to see his imagination just kind of go wild, like when he's playing with his toys and I am cooking dinner or I'm hanging back and not necessarily like, all up in his business, to hear the stories he comes up with with his toys, it's so imaginative," she continued. "It makes me like, so proud. I'm like, 'Oh my gosh, what's going on inside that little head of yours?' It's so sweet. He's really like, a kind boy, so I'm very lucky."
She also said the two like to play-wrestle together, adding, "I have just as many bruises on my body as him."