Pittsburgh Ballet Theatre presents the Pittsburgh premiere of "Roméo et Juliette," set to Sergei Prokofiev's score, opening today and continuing through Sunday at the Benedum Center, 719 Liberty Ave. Performances begin at 7:30 p.m. tonight, at 8 p.m. Friday and Saturday, and at 2 p.m. Sunday. Tickets range from $20.50 to $88.50 and are available by calling 412-456-6666 or by visiting the Web site, www.pbt.org.