The proud mum-of-one posted a snap of Luca on Twitter yesterday, proving that her little man is getting bigger (and cuter!) by the week.
Luca - who will turn two years old later this month - can be seen wearing a navy blue vest and is flashing a pair of dazzling blue eyes.
Praising her estranged husband Mike Comrie for taking the close-up of their son, Hilary wrote: "[heart] melts Mikey gets photo cred for this one ;)"
The 26-year-old is besotted with her first-born and the pair are often seen out and about in their hometown of Los Angeles together, whether at the park, running errands or at a farmer's market.
Last month, Hilary and Mike took Luca on a Valentine's holiday, where they enjoyed plenty of quality time in the sun as a "modern family".
The ex-couple announced their split earlier this year, although insisted that they would remain "best friends".
Their shock announcement came just six months after Hilary had gushed about her love for Mike on their third wedding anniversary, writing on Twitter: "3 yrs ago today I married a wonderful man! So lucky we found each other. He also gave me the most precious boy I ever layed my eyes on!!."
But it wasn't meant to be and in January, she and her ex-hockey play hubby parted ways.
Following the break-up, Hilary thanked fans for their support on Twitter by writing: "Mike and I are sitting here, we are so appreciative for all of your kindness & well wishes. Not an easy day but we're getting thru it together (sic)."
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