Authorities say 9-year-old Dalen Thomas was walking across a highway when he was hit by the pickup around 6:30 a.m. Wednesday.
An ambulance took Thomas to a nearby medical center. He was then airlifted to a children's hospital in Memphis, Tennessee where he died.
Officials say 22-year-old Hunter Newman was the driver of the truck. He's been charged with aggravated assault. His bond is set at $10,000.
The crash remains under investigation by the Mississippi Highway Patrol and the Mississippi Highway Patrol Accident Reconstruction Team.
RELATED: Twin boys and sister fatally struck at school bus stop in Indiana
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