The New Dictionary of Cultural Literacy, Third Edition. 2002.
dramatis personae
(DRAM-uh-tis puhr-SOH-nee, drah-muh-tis puhr-SOH-neye) A Latin expression for cast of characters. It means literally the persons of the drama and is occasionally used at the beginning of scripts for plays as the title of the list of characters.
In general, the dramatis personae are the participants in an event: Winston Churchill, Roosevelt, and Joseph Stalin were the dramatis personae at the Yalta Conference.