President Donald Trump's attorney-turned-enemy Michael Cohen is launching a podcast Monday, titled “Mea Culpa."

He tells The Associated Press his first guest will be comedian and talk-show host Rosie O'Donnell.

Once at odds, Cohen says he and O'Donnell have become friends and bonded as a result of the grudge they bear toward Trump.

“First episode. First interview. First feud. First family,” Cohen told The Associated Press by phone late Thursday.

Trump and O’Donnell have engaged in a lengthy public feud. Challenged during a presidential primary debate in 2015 about how he described some women as “fat pigs,” “dogs” and “slobs,” Trump responded by saying: “Only Rosie O’Donnell.”

Cohen says his relationship with O'Donnell began while he was imprisoned for tax crimes, lying to congress and campaign finance violations.

He says O'Donnell sent him a six-page letter. Cohen wrote an apology in response, which prompted O'Donnell to visit him in prison.