Scarlett started acting at an early age, with one of her first big credits being the Elijah Wood movie, North (1994). She was only nine years old when the movie was filming. She rocketed to stardom a little less than 10 years later when she starred in Lost in Translation at age 17.
Sophie Marceau - 14 years old in "la boum"
and
Natalie Portman - 12 years old in Léon