Hilary Duff on Son Luca: 'He Has Sass for Days'

Hilary Duff stopped by to chat with Rach on a momentous day – her 29th birthday – and opened up about parenting her 4-year-old son Luca.

“He’s scaring me,” she says of Luca, adding, “He’s a ham. He has sass for days!”

Hilary was joined by her ‘Younger’ co-stars Debi Mazar and Nico Tortorella, and they revealed what viewers can expect from the TV Land show’s third season. Debi calls it a “real rollercoaster ride,” while Hilary says, “I’d say it’s a more emotional season than all the rest, and it ends with all of us kind of scattered. We can’t give too much away obviously, but a lot happens.”

Shooting for the season just wrapped and Hilary says she’s going to celebrate by “not [wearing] heels for probably six months.”

Check out the video above to learn about Nico’s “Love Bomb” podcast and Debi’s family’s cafe, the Tuscan Gun. Then, watch a shirtless Nico take us on an insider tour of the “Younger” set, including a demonstration of how he gets those tattoos applied, below: