Answer
Orson Welles was one of the friends Bogdanovich interviewed for his books. They met in 1950, when Bogdanovich was a film student and Welles was directing Othello. Welles encouraged Bogdanovich to pursue a career in film criticism, and the two remained friends for the rest of Welles' life. Bogdanovich interviewed Welles for his books The Cinema of Orson Welles and This Is Orson Welles.