13-year-old Gould will tackle the role of Kent's first girlfriend from his childhood in Smallville, according to Superman Super Site.
Sprayberry's involvement has been rumoured on the Superman: Man of Steel Facebook page. Though unconfirmed, he is now listed as part of the cast on IMDB.
Gould featured in Battle Los Angeles and has made appearances in television shows including The Mentalist and Chuck.
Sprayberry appeared in Shuffle and Bedrooms.
Henry Cavill and Amy Adams will play Superman and Lois Lane respectively, while Michael Shannon will portray villain General Zod and Laurence Fishburne has been cast as Daily Planet editor Perry White.
Diane Lane, Kevin Costner, Antje Traue, Christopher Meloni, Harry Lennix and Richard Schiff will also appear in the movie.
Man of Steel opens on June 14, 2013 in the US, with a UK release date to be confirmed.
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