The report of her split comes just days after she was spotted spending time with another ex, Jason Walsh.
The pair were seen enjoying a walk in New York, though obviously this could just be a friendly reunion rather than a romantic one.
The actress was in a relationship with the personal trainer for most of 2016, before calling it quits in December.
"We were seeing each other for a while. People don't know the ins and outs of everything. It was definitely my first more serious relationship since my ex-husband [Mike Comrie]" she revealed in a Cosmopolitan interview about her relationship with Jason. "I was like, 'F--k it. He's my boyfriend.' I just needed to make sure it was right. People don't need to know my business until I really know my business, you know?"
"I've never been a good dater," Hilary admitted. "I meet, like, one person a year that I'm maybe attracted to. I never want to be that girl who's desperate to find a mate."