Mary Louise Weller died on Thursday, October 1, 2026, one day before she would have turned 80. Nearly half a century earlier she had played Mandy Pepperidge, the sorority girl in National Lampoon’s Animal House, and it remained the part she was best known for.
Her longtime partner, Michael Roy Curtis, confirmed her death to The Hollywood Reporter and Variety. She died after an illness. Her friend David Marks shared the news on Facebook: “Beautiful Mary, friend, actress, model, equestrian, passed away quietly.”
From the camera to the screen
Weller worked as a model, and was in demand, before she moved into acting. Her first film was Hail! in 1972, and a year later she had a small part in Sidney Lumet’s Serpico.
She never pretended the camera was an accident. “I flew out of the womb in full camera makeup and screaming, ‘HAIR! MAKEUP!'” she told the Cult Film Freaks site in a 2012 interview.
Animal House
1978 was the year her career turned. She appeared in the horror film The Evil and was cast in Animal House, the John Landis comedy about the fraternity misfits of Faber College. As Mandy, the girlfriend of the Omega fraternity’s Greg Marmalard, she was part of the polished campus establishment the film sets out to humiliate.
The Bell Jar, adapted from Sylvia Plath’s novel, followed in 1979.
Television and the early 1980s
Through the late 1970s and early 1980s Weller was a regular guest on network television, with appearances in Kojak and Starsky & Hutch in 1978, Fantasy Island in 1979 and 1980, CHiPs in 1981 and Quincy, M.E. in 1983.
Her film work continued with three releases in 1982: the Chuck Norris action film Forced Vengeance, Larry Cohen’s monster film Q, and Blood Tide.
After acting
Away from the screen Weller became an accomplished equestrian.
Marks listed her in four words: friend, actress, model, equestrian. Only one of those had anything to do with Faber College.