Fired “Celebrity Apprentice” contestant Star Jones’ ex-husband, Al Reynolds, is demanding $50,000 from the loose-lipped diva for trashing him on “The Wendy Williams Show” and blasting his rumored current girlfriend — her TV nemesis, NeNe Leakes.

Sources say Jones herself pushed for stipulation in her 2008 divorce agreement with Reynolds that they would not make “disparaging remarks” about each other’s “personal, private or family life . . . including, without limitation, the other’s family, companions, dates, acquaintances, or future spouses.” Her lawyers insisted a breach of the clause requires the offending party to pay a $50,000 “liquidated damage penalty.”

But, according to Reynolds, Jones forgot, went on Williams’ March 25 show and trashed her almost four-year marriage, saying, “You know what . . . the wedding was fabulous, but the marriage was kind of booty.”

To add insult to injury, Jones then went after Leakes, who became her biggest “Celebrity Apprentice” rival. After Leakes said that she “wouldn’t spit on Jones” if she were on fire, Jones told Williams: “That is not a ladylike thing to say. Oh, but then again, we are talking about someone else here.”

Banker-turned-professor Reynolds refers to outspoken “Real Housewives of Atlanta” reality star Leakes in the court papers as his “acquaintance.” But Leakes has denied recent reports she was “revenge dating” him to get back at Jones, saying; “I don’t know Al from a can of paint!”

Reynolds’ attorney, Jason S. Weiss, fired off a letter to Jones seven days after her appearance on Williams’ show to demand she pay him $50,000. The letter, obtained by Page Six, references Jones’ “booty” comment.

Jones ignored the letter, we’re told. Reynolds’ attorney filed a complaint in Miami-Dade County Court last night.

Jones’ rep declined comment, but a source close to her said: “He’s going back to the well and is grasping at straws to stay in the limelight.” Reynolds’ rep had no comment.