Bill Cosby and his former lawyer have been ordered to give sworn depositions in the defamation lawsuit brought by an ex-supermodel who says they falsely called her a liar after she publicly accused the comedian of sexually assaulting her three decades ago.

The ruling by Los Angeles County Superior Court Judge Debra Weintraub marks the second time in two months that Cosby, 78, will be required to testify under oath in response to a complaint of sexual misconduct against him.

In this case, he and Martin Singer, a prominent Los Angeles lawyer who had represented Cosby until he was replaced last month with a new legal team, must submit to questions from lawyers of one-time model and reality TV personality Janice Dickinson.

The judge ruled both depositions are to be taken by November 25, but stipulated nothing in her order would override attorney-client privilege. Cosby's lawyers said they would appeal her decision.

Dickinson, 60, is one of the best known of more than 50 women who have come forward to accuse Cosby of sexually assaulting them after plying them with drugs or alcohol, allegations the comedian has denied.

Cosby has never been criminally charged. And many of the alleged incidents date back decades, putting them beyond the statute of limitations.