15-year-old Claudette Colvin was arrested in March 1955 (nine months before Rosa Parks, 42) for refusing to give up her seat on a Montgomery, AL. bus.
The local NAACP, itching for a case to challenge the bus segregation law, almost went with Colvin’s case, but dropped it because they didn’t think Colvin fit the bill: She allegedly resisted arrest, she was too dark-skinned, she was from the poorer part of town, and she was pregnant.

Colvin was a member of the youth chapter of the local NAACP and was party to the 1956 U.S. Supreme Court case (Browder V. Gayle) that eventually outlawed segregation on busses.

A footnote to this footnote: Colvin was mentioned in the original boycott fliers that went out after Parks’ arrest. However, the fliers misspelled her name