Arnold Drummond is a fictional character from the television series Diff’rent Strokes, which aired from 1978 to 1986. He is portrayed by actor Gary Coleman and is known for his catchphrase, "What'choo talkin' 'bout, Willis?" Arnold is a young African American boy who, along with his brother Willis Drummond, is adopted by a wealthy white man named Philip Drummond after their mother passes away. The show explores themes of race, class, and family dynamics as Arnold navigates life in a new environment. His character is often depicted as clever and resourceful, using humor to cope with various challenges. Diff’rent Strokes became a significant part of American pop culture, and Arnold's character remains iconic.