Natalie Portman was:

• 16 years old when filming began for Star Wars: Episode I – The Phantom Menace in 1997, and about 18 when the movie was released in 1999

• 19 years old at the start of filming Star Wars: Episode II – Attack of the Clones in 2000, and 21 when it was released in 2002

• 22 years old when filming began for Star Wars: Episode III – Revenge of the Sith in 2003, and nearly 24 at its release in 2005

In summary, Natalie Portman was a teenager to young adult during the shooting and release of the Star Wars prequel trilogy, playing Padmé Amidala who was younger or slightly older than her in the films