Robert Carradine, the actor who starred in Lizzie McGuire and Revenge of the Nerds, has died at the age of 71, his family announced. Carradine's family confirmed his death in a statement to Deadline on Monday, noting that the actor "struggled for two decades with Bipolar Disorder.""It is with profound sadness that we must share that our beloved father, grandfather, uncle, and brother Robert Carradine has passed away. In a world that can feel so dark, Bobby was always a beacon on light to everyone around him.