Katie Capper (born February 4, 2023) is the identical octuplet sister of Maria, Nicole, Leslie, Emma, Annie, Angela and Katie and a daughter of Ian and Claire, who own a cookie business.
- Father: Ian Capper (1993-)
- Mother: Claire Capper (née: Nixon) (1995-)
- Sisters: Katie Capper (2023-), Maria Capper (2023-), Nicole Capper (2023-), Leslie Capper (2023-), Emma Capper (2023-), Annie Capper (2023-), Angela Capper (2023-)
- Cousins: Kolben Capper, Carol Capper, Dakota Capper, Mary-Leah Capper, Stanley Capper, Tabby Capper
- Grandmothers: Ashley Capper (née: ; -), Nixon (née: ; -)
- Grandfathers: Walton Capper ( -), Nixon ( -)
- Her full name is Natalie Nevaeh Capper
- In Christmas 2026, she opened her presents to reveal a purple sweater, . And in her stocking, she found a Mickey Mouse plush toy, .