Mary Louise Weller was born September 1, 1946, and raised in Los Angeles. The onetime top New York model made her film debut with a small uncredited role in Serpico (1973).Weller was especially memorable as a beautiful marine biologist in the made-for-TV picture Hunters of the Reef (1978) and, likewise, solid as professor Andrew Prine's college student lover in the superior haunted house horror winner The Evil (1978). But she achieved almost cultural-icon status with her excellent performance as sorority girl Mandy Pepperidge in the uproarious hit comedy Animal House (1978). After "Animal House", Weller went on to play many notable roles in both comedy and drama.