Former Lizzie McGuire star Hilary and ex-hockey player Mike were snapped spending time with Luca while shopping in LA on Sunday, 25 May.
Hilary, 26, and Mike, 33, have remained amicable since they announced their split in January 2014, following three years of marriage and one child.
At the time, a rep said: "They remain best friends and will continue to be in each other's lives. They are dedicated to loving and parenting their amazing son and ask for privacy at this time."
And four months down the line that hasn't changed, as the former couple are often pictured out and about with their son, who was born in March 2012.
Earlier this month, Hilary told E! News: "We love each other so much and we love spending time together, so when you see us out, it's not just for Luca, it's because we make plans and we hang out."
As for whether they'll ever get back together, she told Us Weekly: "We have Luca as our main priority but we do care a lot about each other. We're adults and we're making our way through life. Sometimes you do that together and apart and we're gonna be and we're going to do it in the most peaceful way possible."
Former child star Hilary married Mike in Santa Barbara, California in August 2010, after meeting three years earlier while holidaying with friends in Idaho. They became engaged during a holiday to Hawaii in February 2010.
As well as caring for son Luca - and dealing with her separation - Hilary has been busy in the recording studio working on her first new music for years.
It will be her first album since 2007's Dignity.
This week, Hilary told fans: "To know y'all are thinking of me daily makes me feel special. I'm working on this damn record daily! Hope to make y'all proud!!!!!"
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Celebrity splits of 2014 in pictures:
Copyright: WENN Apega