"I'm at a really fun stage right now," the Two and a Half Men guest star says. "My son is 13 months, so we just celebrated his first birthday. He's running around everywhere. He knows what he wants and what he doesn't like and really has a personality now."
Though raising Luca is her main focus, Duff admits she also makes time for herself. "It's kind of a heaviness at first, to admit you just need to get away for a second," she says of motherhood. "That's one thing I learned that is OK."
Duff, who released her last album Dignity in 2007, says she's eager to record new music. In the meantime, the former Lizzie McGuire star is promoting her latest novel, True, and reading scripts.
"I'm starting to get back into the studio again," Duff says. "I want to work on my music, but it's tough to be pulled away from Luca. Whatever I work on, I want it to be worth missing time with him."