Vivian Nixon: Vivian Nixon. Actress: 500 Days of Summer. Vivian M. Nixon is an African-American actress and dancer from Miami, Florida known for voicing Millie from Helluva Boss. She also acted in Hubie Halloween starring Adam Sandler, Marc Webb's 500 Days of Summer, Top Five, Grey's Anatomy, Glee and Christmas on the Square. She has a daughter, Shiloh Elizabeth Williams who was born in February 2019.
