A network representative confirmed the casting of the 19-year-old Canadian actress in "Imperfect Justice" to UsMagazine.com.
Deveaux's small-screen credits include "Less Than Kind," "Baxter" and "Silent Witness."
UsMagazine.com said "Imperfect Justice" will focus on the attorneys behind the controversial 2011 trial of Anthony, 26, who was accused of killing her 2-year-old daughter, Caylee.
Anthony was acquitted last July of murdering Caylee in 2008. The child's skeleton was found in a wooded area near Anthony's home several months after Anthony reported she had been kidnapped, a claim she later recanted.
The cause of Caylee's death was not determined due to the condition of her remains. No one else has been arrested in the case.