©Courtesy of HBO, The Outsider Cynthia Erivo, an actress from “Wicked,” has joined the cast of Snoop Dogg‘s biopic at Universal Pictures. Erivo will play rapper Tupac Shakur’s mother, Afeni Shakur, a former Black Panther activist struggled with her son’s relationship. She was the subject of Shakur’s 10 hit “Dear Mama”. Jonathan Davis, the actor…