Who is the youngest performer to be nominated for Best Actress in Oscar?

Question

Who became the youngest actor to have 6 Oscar nominations with her Best Actress nomination for "The Reader" (which was her first win!)?

Answer 1

Keisha Castle-Hughes

Keisha Castle-Hughes is the youngest person to be nominated as Best Actress -- for Whale Rider (2003, NZ) when she was 13 years old. Marlee Matlin is the youngest person to actually win Best Actress (when she was 21 years old), for Children of a Lesser God (1986); it was the film's sole win.