“The Roaring 2017s” is the theme of Seneca Valley’s High School Prom. Court members are, seated from left, Ana Batista, Hannah Testa, Isabelle Biase, Isabelle Gallagher, Julia Gaydos, Sydney Huber, Mia Moretti, Hollen Davinsizer, and Sydni Kumanchik; and standing, from left, Jackson Nickel, Ian Fox, Matt Gagnon, Marshall Price, Brock Gresock, Joe Demeis, Kyle Cindrich, Neil Ahuja and Travis Ball. Missing from the photo are Aaron Wolf and Jessica Altsman. The Grand March will begin at 5 p.m. Saturday in the senior high school auditorium. Doors will open for guests at 4:30 p.m. The prom will be from 6 to 11 p.m. at Stage AE in Pittsburgh.