Claire Danes is happy to see her newborn baby "getting fat" and healthy.
The 33-year-old actress and her husband Hugh Dancy welcomed their first son, Cyrus, into the world in December.
Claire has been breastfeeding her little tyke and he is growing at a rapid rate.
She is astonished by how big Cyrus is becoming and relishes the experience of bonding with her son.
"He's six weeks and getting fat. It's very exciting. All that time on the boob is starting to result in growth," Claire told E! News' Giuliana Rancic at the Screen Actors Guild Awards on Sunday.
"He's getting rolls… thank goodness they've arrived. He's starting to smile a little bit and he kind of knows I exist. That's reassuring - that feedback is amazing."
Claire has achieved praise for her portrayal of bi-polar anti-terrorist agent Carrie Mathison in TV show Homeland.
Having a family boosts her acting craft in surprising ways.
"I'm able to disassociate," Claire explained.
"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 me able to sustain it otherwise."
Claire's Homeland character has earned her a Golden Globe win and a Screen Actors Guild Award this year and US President Barack Obama is a noted fan of the series.
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