Pfeiffer was born in Zimbabwe and grew up in
Seattle, Washington. Her mother is African-American, and was adopted and raised in Boston, while her father is white. Her maternal grandfather was former congressman
Ron Dellums; she and her mother were able to connect with him a year before he died. Her parents are anthropologists at the
University of Washington. Pfeiffer began her interest in music by taking violin lessons at four years old. In 2019, Pfeiffer shared the role of Eva Perón with Maia Reficco in the
New York City Center's production of
Evita, Pfeiffer playing Perón from age 20–33. Pfeiffer earned positive reviews for her performance. In 2022, she performed in
Almost Famous as Penny Lane at the
Bernard B. Jacobs Theater on Broadway. In the summer of 2024, she starred as Myrtle Wilson in
Florence Welch's
Gatsby: An American Myth at the
American Repertory Theatre. Later that same year, she joined the cast of
Moulin Rouge! as Satine on Broadway at the
Al Hirschfeld Theatre. She starred opposite John Cardoza and Fisher as Christian. == Personal life ==