01/27/2013 AT 08:05 PM EST
Actresses don't usually like to talk about weight gain, but Claire Danes
was more than happy to Sunday evening. Of course, the topic of discussion was her 6-week-old son Cyrus Michael Christopher
"He's six weeks and getting fat. It's very exciting. All that time on the boob
is starting to result in growth," the Homeland
star, 33, told Giuliana Rancic on E!'s Live from the Red Carpet
at the SAG Awards
"He's getting rolls ... thank goodness they've arrived. He's starting to smile a little bit and he kind of knows I exist," she added. "That's reassuring – that feedback is amazing."Winner
of best actor in a TV series – drama for her role as Carrie Mathison, a Central Intelligence Agency officer, the new mom said her marriage to
Hugh Dancy helps her step out of character once filming is done.
"I'm able to disassociate," the actress, wearing a one-shouldered Givenchy dress, said. "There are all these unconscious rituals that help me engage and disengage – like taking my wedding ring on and off helps free me up. I wouldn't be able to sustain it otherwise."