Many Astro Boy posters have surfaced on the Internet. This is the latest one from SDCC.  I rather like it because of the electrical device connected to the inside of his robot body.  His father placed that in there, which generated the life force that gave Astro Boy his unique personality. 

Astro Boy is based on the highly successful Japanese franchise of the same name by Osamu Tezuka. Freddie Highmore provides the voice for the character of Astro Boy in the movie. The film features the voices of Freddie Highmore, Kristen Bell, Nathan Lane, Eugene Levy, Matt Lucas, Bill Nighy, Donald Sutherland and Nicolas Cage.