While neither Jason nor Eiza have confirmed the romance, the couple have allegedly been casually dating as of late.
"They are dating. He cares about her," an insider told People, adding that Jason is "quite busy and he's in a good place."
Another source said that it's reportedly "nothing serious yet," but the duo are "having fun together" for the moment.
There's no photo evidence of the relationship just yet, but Jason did attend the premiere of Eiza's film Ambulance last month.
The news comes just four months after Jason and Lisa announced their split — and not long after Jason had to shut down rumors that the former couple had reunited.