According to Us Weekly, Jenny helped Melissa get her Hollywood break when she was working on the sitcom "Jenny" in the '90s.
Although they've both carved out their own successful careers, they've stayed in touch and have shared throwback photos from their childhood together.
When a movie critic insulted Melissa's weight in 2013, Jenny stood up for her cousin against the critic's review.
"I don't have the whole story, but, I do know that, after being in this business 20 years, it's really crummy that you get attacked in your personal life in general," she told E! News, adding, "She's very very talented and people know that, so... He can go to hell."