The former Lizzie McGuire star snapped her beautiful pooch sitting in her front hallway… but just check out little Luca peering out from behind a wall on the right hand side!
Hilary posted the picture to Twitter on Sunday night (3 November), adding the caption: "I spy a little Luca…"
The 26-year-old gave birth to adorable Luca in March 2012. His dad is her retired hockey pro husband Mike Comrie.
Hilary has made no secret of how much she loves being a mother but hit out at the weekend after it was claimed she is hoping to add a daughter to her family soon.
She wrote: "I love that I do an interview and people ask if I want more kids. I say yes, not now though, and all of a sudden I'm "trying" for a girl. WHAT?"
"It's ridiculous," she added. "The only baby I'm working on is my album."
Well, we're more than excited about that project! Hilary confirmed in August that she's back in the studio working on a follow-up to her last album, which was way back in 2007. (We feel old!)
Her previous tracks have included fab songs like 'Come Clean', 'So Yesterday' and 'Beat Of My Heart'.