Keenan was born on May 20, 1999, in New York City to parents William Keenan Jr. and Cynthia Rowley. Her father is a sculptor in Brooklyn and also has a wide range of projects in planning, design, and construction throughout New York City. On the other hand, her mother is a fashion designer.
Regarding her education, Kit went to a local school in New York. She then went to New York University where she is currently in the final year. She cites her mother as a role model and wishes to be a fashion designer like her.
