The singer posted the snap of herself with baby Luca Cruz and her husband Mike Comrie on her Twitter account.
It's just one of many the 24-year-old has been sharing over the past few weeks while she adjusts to being a first time mum.
After showing off her son's tiny toes, Hilary posted a few photos showing his cute little face for the first time.
She posted: "Oh no! The flood gates have opened! Proud mamma on the loose! I can't help myself."
The star's joy at motherhood is evident in many of her tweets.
"No better feeling that a peaceful baby sleeping on your chest...wonder what he's dreaming about? #happymommy," reads one of the latest comments.
Hilary also used the micro blogging site to thank her frind Jessica Alba for sending a box full of goodies for the new arrival.
"Thanks @honest @jessicaalba for the box of goodies for Luca!" she wrote.
"The whole line looks amazing! Excited to try everything."
The Fantastic Four actress gifted items from her eco-friendly baby product line The Honest Company.
Hilary and her former ice hockey pro husband welcomed little Luca on March 23.
Hilary tweeted her fans after she gave birth saying: "Welcome to the World Luca Cruz Comrie! Tuesday evening, we became proud parents of a healthy 7 pound 6 ounce beautiful boy."