Simplify the following text for a Grade 6 native English-speaking person.
Original: Robert Barton Englund ( born June 6 , 1947 ) is an American actor and voice-actor , best known for playing the fictional serial killer Freddy Krueger , in the Nightmare on Elm Street film series .
Simplified: Robert Englund ( born June 6 , 1949 ) is an American actor . He is most famous for playing Freddy Krueger in the Nightmare on Elm Street movies .