Born to theatrical parents, Katherine Mallen Kupferer made her professional stage debut in Chicago Shakespeare Theater's acclaimed production of Gypsy and her major motion picture debut in Steve McQueen's Widows. Most recently, she can be seen as Gretchen in Lionsgate's long-anticipated film adaptation of Judy Blume's beloved classic Are You There God, It's Me, Margaret.
Oyuncu
| 2025 | They Rescue Horses, Don’t They? as Aubrey |
| 2024 | Ghostlight as Daisy |
| 2023 | Orada Mısın Tanrım? Benim, Margaret as Gretchen Potter |
| 2018 | Dul Kadınlar as Gun Daughter |
| 2016 | Fools as Vera’s daughter |
| Mouse as Minnie |
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