Final answer:
The attorney's disclosure of a former client's confidential marriage and divorce information based on a "generally known" exception is questionable, as the duty of confidentiality extends to information that is not independently made public, regardless of the client's current celebrity status.
Step-by-step explanation:
Whether the "generally known" exception to the duty of confidentiality applies to an attorney's disclosure of confidential information about a former client's marriage and divorce depends on the specifics of what is considered to be generally known.
The American Bar Association's Model Rules of Professional Conduct Rule 1.9(c) prohibits attorneys from using information relating to the representation of a former client to the disadvantage of the former client unless the information has become generally known.
Yet, the fact that the matter has become widely discussed in the media following the client's rise to celebrity status does not necessarily mean that all aspects of the story are "generally known" in the context of the rules.
Moreover, if the information was learned during the course of the attorney-client relationship and hasn't been independently made public, the duty of confidentiality likely prohibits disclosure without express consent from the client.