Arnold Jackson is the main character in Diff'rent Strokes. Arnold is played by child actor Gary Coleman in the show. 

Arnold Jackson

What-ya talking about (Name)!
Personal Information
Gender: Male
Nationality African American
Ethnicity Black
Full name Arnold John Jackson
Nickname Arnelda (Alias) Abubaka (former alias), Blood (By Willis)
Hair Color: black
Age: Born 1970
Birthplace Harlem
Related to: Willis Jackson (Brother) Kimberly (adoptive sister), Mrs. Jackson (Mother), Mr. Jackson (father), Mertle (distant cousin), Phillip Drummond (adoptive father), Sophia (adoptive aunt), Heinrich Van Drummond (Adoptive distant great uncle), Maggie Drummond (adoptive Step-mother), Sam (Adoptive Step-brother)
Hometown New York City
Character information
Appeared on: Different Strokes
Character played by: Gary Coleman
Diff'rent Strokes Poster