Simplify the following text for a Grade 7 native English-speaking person.
Original: Natalie Hershlag ( ; born June 9 , 1981 ) , better known by her stage name Natalie Portman , is an Israeli and American actress .
Simplified: Natalie Hershlag ( born June 9 , 1981 ) is an Israeli-American actress . She is usually known by her stage name Natalie Portman .