The feud between Keshia Knight Pulliam and her ex, Ed Hartwell, just took new heights as the athlete is now gunning for joint custody of their newborn daughter, Ella Grace.

According to TMZ, Ed says he's not alone in thinking he deserves joint custody as his ex-wife, former Real Housewives of Atlanta cast member Lisa Wu, is also vouching for him.

In new docs added to his divorce case with the Cosby Show child star, Ed requested the motion. He submitted a letter from Lisa, who highlighted his skills as a great father.

"I am never worried about my child when he is with his dad, I know his dad will do everything within his power to love, protect and provide for EJ while he is not with me," she wrote. "I am positive that [Hartwell] will put his daughter's best interest first as he has shown with my children."

Keshia reportedly does not want Ed anywhere near their 2-month-old as she claims he strategically plotted for her to miscarry during her pregnancy. He's denied these claims completely.

Though he wants joint custody of Ella Grace, he also states in the docs that he is willing to pay child support.

The former NFL star filed for divorce from Keshia in July 2016, and initially claimed there was a possibility that their daughter was not his.

Get the rundown on the demise of their relationship in the BET Breaks video, above.