Hilary Duff posted an adorable photo of her son Luca looking so grown up on Instagram on Saturday, December 19 Credit: Craig Barritt/Getty Images for Fast Company

He’s all grown-up! Hilary Duff shared an adorable Instagram photo of her son, Luca, and he’s looking like a little man.

“About to kisssss this face right off!” the Younger actress, 28, captioned the sweet snap of Luca, 3, staring into the camera on Saturday, December 19.

Duff shares her son with her ex-husband, Mike Comrie. The pair, who split in January after four years of marriage, reunited on November 27, to go Black Friday shopping with Luca at the Grove in L.A.

On Thanksgiving, the former Disney Channel star took to Instagram to express her gratitude for her son.

About to kisssssss this face right off😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍

A photo posted by Hilary Duff (@hilaryduff) on

“#thankfuleveryday,” she captioned a pic of Luca, in which he looked like he was reaching out to his mom.

Duff and Comrie have remained amicable since their split, and she opened up about their divorce earlier this year, admitting that their relationship "wasn't working well enough to stay together, but there was still a lot of love involved."

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