That is, his son, Orion Christopher Noth, born in January to the actor and his long-time girlfriend, Tara Wilson.
"He's beautiful. I have to go back and forth because he's out in L.A.," Noth, who besides starring on Law & Order: Criminal Intent is also reprising his TV role of Mr. Big for the Sex and the City movie, tells PEOPLE.
"I skipped the London premiere to be with him," Noth said at Wednesday's Gotham magazine and Joseph Abboud benefit for the Rainforest Action Network, held at the Lord & Taylor department store in Manhattan.
"He's growing everyday – it's amazing. He's a beautiful kid. He's coming to New York for the first time next week," says the proud dad, 53.
As for what's in store for "Baby and the City," "He's a little young, but he's definitely going to love all the lights in Times Square," says Noth. Other plans include "the zoo in Central Park. He loves nature already, so I'll take him to the park."
Along those lines, Noth said at the event that was aiding a group whose mission is "to leave a safe and secure world for our children": "I would like for him to have a future – to see seasons and know that in the winter it gets cold, then it thaws out and there's a summer. Hell, I'd like to see walruses and panda bears – I think there's room for all of us."
Reporting by SUSAN L. YARA