Despite a reconciliation that gave them both cause for laughs, late-night talk-show host Jimmy Kimmel, 41, and comedian Sarah Silverman, 38, have split, a source confirms to PEOPLE.
No reason was revealed for their second breakup. The funny duo dated for five years before they called it quits last July. But they rekindled their relationship just a few months later. "They're taking it slow," a source told PEOPLE last fall. "They're on the road back to being together."