Pharrell Williams as Pharrell Williams (voice)

Chad Hugo as Chad Hugo (voice)

Gwen Stefani as Gwen Stefani (voice)

Kendrick Lamar as Kendrick Lamar (voice)

Timbaland as Timbaland (voice)

Justin Timberlake as Justin Timberlake (voice)

Busta Rhymes as Busta Rhymes (voice)

Jay-Z as Jay-Z (voice)

Snoop Dogg as Snoop Dogg (voice)

Morgan Neville as Morgan Neville (voice)

Pusha T as Pusha T (voice)

N.O.R.E. as N.O.R.E (voice)

Shay Haley as Shay Haley (voice)

Oprah Winfrey as Oprah Winfrey (voice) (archive footage)

Missy Elliott as Missy Elliott (Voice)

Helen Lasichanh as Helen Lasichanh (voice)

Jimmy Iovine as Jimmy Iovine (voice)

Rob Walker as Rob Walker (voice)

Teddy Riley as Teddy Riley (voice)

Mimi Valdés as Mimi Valdés (voice)

Tyler, The Creator as Teacher (voice)

Carolyn Williams as Carolyn Williams (voice)

Pharoah Williams as Pharoah Williams (voice)

Rocket Williams as Rocket Williams (voice)

Nigo as Nigo (voice)

Helen Williams as Helen Williams (voice)

Jon Platt as Jon Platt (voice)

Tina Johnson as Additional Voices (voice)

Andrew Coleman as Additional Voices (voice)

Monique Hawkins as Additional Voices (voice)

Nathaniel 'Fam-Lay' Johnson as Additional Voices (voice)

Alan Sharps as Additional Voices (voice)

Steve Stoute as Additional Voices (voice)

Maria Williams as Additional Voices (voice)

Charlie Willson as Additional Voices (voice)

Carl Sagan as Carl Sagan (voice) (archive sound) (uncredited)

Leonard Nimoy as Spock (voice) (archive sound) (uncredited)