Katharine McPhee. (Photo: Matthew Murphy)

Cast members of “Waitress” will participate in a question-and-answer session following the performance on Dec. 9.

The talkback will be moderated by SiriusXM host Julie James and will feature cast members Katharine McPhee, Drew Gehling, Christopher Fitzgerald, Molly Hager and Stephanie Torns.

This joins the previously announced cast album karaoke event, hosted by composer Sara Bareilles, following the performance on Dec. 17.