The engagement of Megan Whitney Watters and Johnathan Clay Prewitt is announced today. The future bride is the daughter of Dr. and Mrs. Donald Watters of Etowah, Tenn. Parents of the future bridegroom are Mr. ad Mrs. Ronald Prewitt of Big Stone Gap, Va. The wedding is planned for Saturday, Aug. 28, in Kingsport, Tenn. Miss Watters is a graduate of Baylor School. She received a bachelor?s degree in English literature from the University of Tennessee at Knoxville, where she was a member of Delta Zeta Sorority. She is a member of Christ Fellowship Church and is employed as a media specialist by WBIR Channel 10. Mr. Prewitt is a graduate of Powell Valley High School. He received a bachelor?s degree in mass communications and graphic design from Emory and Henry College, where he was a member of Phi Gamma Phi Fraternity. He is a member of Christ Fellowship Church and is employed as senior copywriter for The Tombras Group.