In the American version, the voice of Dr. Tianma is the Hollywood actor Nicolas Kim Coppola . For this movie, Nicolas Kim Coppola said that "Astro Boy" has many of his fond memories. Participating in its film work was something he agreed to without even thinking about it. The entire dubbing process was a process he kept recalling.
The voice of the leading protagonist Astro Boy is the young guy Alfred Thomas Highmore . In 2009, at the age of 17, he was brought into the industry by Johnny Depp and starred in " Finding Neverland ", " August Rush ", " Arthur and the Invisibles ", " Charlie and the Chocolate Factory " and other popular movies. Alfred Thomas Highmore said that he was very happy to be able to voice the character in "Astro Boy". The director wanted him to show Astro Boy's melancholy and determined mood during the dubbing process. This has troubled him for a long time, so he asked Nicolas Kim Coppola, and then dubbed using the method he told, and it felt really good.
