Jamal Woolard heavily prepared for his role for months, which includes listening and remembering the lyrics to all songs by Biggie, gaining weight and vocal lessons at Juilliard School to get the voice right.
Most of the film was adapted from the book, "Unbelievable: The Life, Death and Afterlife of the Notorious B.I.G." by Cheo Hodari Coker.
Rappers Beanie Sigel and Guerilla Black auditioned for the role of Biggie. Singer Sean Kingston also auditioned and publicly claimed he had gotten the role.