Leslie Sumner is a recurring character on Beverly Hills, 90210. She is portrayed by Brooke Theiss.
Leslie was the head of the Alpha Omega sorority where Brenda Walsh, Kelly Taylor, Donna Martin, and Andrea Zuckerman initially had planned on pledging. While none of them would join, Leslie was shown to be Jewish while warning Andrea to downplay her religion if she wanted to get chosen for the sorority. She later apologized and revealed that she was more self-conscious about being Jewish than Andrea.
Leslie was often seen flirting with Steve Sanders, once making Celeste Lundy jealous, and had a popular reputation among many of the KEG brothers. Mike Ryan stated that he dated her for six months.
Leslie returned in season 5 as an alumni and was in charge of the Tournament of Roses Royal Court.